1656996432 has 320 divisors, whose sum is σ = 5546311680. Its totient is φ = 414554112.

The previous prime is 1656996401. The next prime is 1656996433. The reversal of 1656996432 is 2346996561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656996433) 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, 13047153 + ... + 13047279.

It is an arithmetic number, because the mean of its divisors is an integer number (17332224).

Almost surely, 2^1656996432 is an apocalyptic number.

1656996432 is a gapful number since it is divisible by the number (12) 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 1656996432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2773155840).

1656996432 is an abundant number, since it is smaller than the sum of its proper divisors (3889315248).

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

1656996432 is a wasteful number, since it uses less digits than its factorization.

1656996432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 284 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 51.

The square root of 1656996432 is about 40706.2210478939. The cubic root of 1656996432 is about 1183.3335860521. Note that the first 3 decimals are identical.

The spelling of 1656996432 in words is "one billion, six hundred fifty-six million, nine hundred ninety-six thousand, four hundred thirty-two".