64880528742 has 160 divisors (see below), whose sum is σ = 157160577024. Its totient is φ = 19946995200.

The previous prime is 64880528731. The next prime is 64880528743. The reversal of 64880528742 is 24782508846.

64880528742 is a `hidden beast` number, since 6 + 48 + 8 + 0 + 528 + 74 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64880528743) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 38231638 + ... + 38233334.

Almost surely, 2^64880528742 is an apocalyptic number.

64880528742 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 64880528742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78580288512).

64880528742 is an abundant number, since it is smaller than the sum of its proper divisors (92280048282).

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

64880528742 is a wasteful number, since it uses less digits than its factorization.

64880528742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2096 (or 2087 counting only the distinct ones).

The product of its (nonzero) digits is 6881280, while the sum is 54.

The spelling of 64880528742 in words is "sixty-four billion, eight hundred eighty million, five hundred twenty-eight thousand, seven hundred forty-two".