32457565440 has 216 divisors, whose sum is σ = 115923644928. Its totient is φ = 8376053760.

The previous prime is 32457565403. The next prime is 32457565451. The reversal of 32457565440 is 4456575423.

32457565440 is a `hidden beast` number, since 3 + 2 + 4 + 57 + 56 + 544 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 311677 + ... + 402563.

Almost surely, 2^32457565440 is an apocalyptic number.

32457565440 is a gapful number since it is divisible by the number (30) 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 32457565440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57961822464).

32457565440 is an abundant number, since it is smaller than the sum of its proper divisors (83466079488).

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

32457565440 is a wasteful number, since it uses less digits than its factorization.

32457565440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90945 (or 90928 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 45.

The spelling of 32457565440 in words is "thirty-two billion, four hundred fifty-seven million, five hundred sixty-five thousand, four hundred forty".