1642366080 has 384 divisors, whose sum is σ = 6126120000. Its totient is φ = 404103168.

The previous prime is 1642366079. The next prime is 1642366087. The reversal of 1642366080 is 806632461.

1642366080 is a `hidden beast` number, since 1 + 6 + 42 + 3 + 6 + 608 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

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

It is not an unprimeable number, because it can be changed into a prime (1642366087) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4705746 + ... + 4706094.

Almost surely, 2^1642366080 is an apocalyptic number.

1642366080 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 1642366080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3063060000).

1642366080 is an abundant number, since it is smaller than the sum of its proper divisors (4483753920).

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

1642366080 is a wasteful number, since it uses less digits than its factorization.

1642366080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 1642366080 is about 40526.1160241146. The cubic root of 1642366080 is about 1179.8405606660.

The spelling of 1642366080 in words is "one billion, six hundred forty-two million, three hundred sixty-six thousand, eighty".