1623613680 has 320 divisors, whose sum is σ = 6119608320. Its totient is φ = 393237504.

The previous prime is 1623613657. The next prime is 1623613681. The reversal of 1623613680 is 863163261.

1623613680 is a `hidden beast` number, since 16 + 23 + 613 + 6 + 8 + 0 = 666.

It is a super-2 number, since 2×1623613680² = 5272242763766284800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1623613681) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1880929 + ... + 1881791.

It is an arithmetic number, because the mean of its divisors is an integer number (19123776).

Almost surely, 2^1623613680 is an apocalyptic number.

1623613680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1623613680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3059804160).

1623613680 is an abundant number, since it is smaller than the sum of its proper divisors (4495994640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1623613680 is a wasteful number, since it uses less digits than its factorization.

1623613680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965 (or 953 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1623613680 is about 40294.0898892133. The cubic root of 1623613680 is about 1175.3329202997.

The spelling of 1623613680 in words is "one billion, six hundred twenty-three million, six hundred thirteen thousand, six hundred eighty".