1623387696840 has 432 divisors, whose sum is σ = 6645835228500. Its totient is φ = 342516335616.

The previous prime is 1623387696803. The next prime is 1623387696859. The reversal of 1623387696840 is 486967833261.

1623387696840 is a `hidden beast` number, since 162 + 3 + 387 + 6 + 96 + 8 + 4 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 265878421956 + 1357509274884 = 515634^2 + 1165122^2 .

It is a super-2 number, since 2×1623387696840² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 2708886 + ... + 3253434.

Almost surely, 2^{1623387696840} is an apocalyptic number.

1623387696840 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 1623387696840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3322917614250).

1623387696840 is an abundant number, since it is smaller than the sum of its proper divisors (5022447531660).

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

1623387696840 is a wasteful number, since it uses less digits than its factorization.

1623387696840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544606 (or 544579 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 63.

The spelling of 1623387696840 in words is "one trillion, six hundred twenty-three billion, three hundred eighty-seven million, six hundred ninety-six thousand, eight hundred forty".