64627645932 has 90 divisors (see below), whose sum is σ = 174576061044. Its totient is φ = 20847527280.

The previous prime is 64627645913. The next prime is 64627645939. The reversal of 64627645932 is 23954672646.

64627645932 is a `hidden beast` number, since 6 + 4 + 627 + 6 + 4 + 5 + 9 + 3 + 2 = 666.

It is a super-2 number, since 2×64627645932² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (64627645939) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 207583 + ... + 415145.

Almost surely, 2^64627645932 is an apocalyptic number.

64627645932 is a gapful number since it is divisible by the number (62) 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 64627645932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87288030522).

64627645932 is an abundant number, since it is smaller than the sum of its proper divisors (109948415112).

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

64627645932 is a wasteful number, since it uses less digits than its factorization.

64627645932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207641 (or 207599 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 54.

The spelling of 64627645932 in words is "sixty-four billion, six hundred twenty-seven million, six hundred forty-five thousand, nine hundred thirty-two".