64987000920 has 128 divisors (see below), whose sum is σ = 229365950400. Its totient is φ = 16310458368.

The previous prime is 64987000889. The next prime is 64987000951. The reversal of 64987000920 is 2900078946.

It is a happy number.

64987000920 is a `hidden beast` number, since 6 + 498 + 70 + 0 + 0 + 92 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (64987000889) and next prime (64987000951).

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 31 ways as a sum of consecutive naturals, for example, 1751439 + ... + 1788158.

Almost surely, 2^64987000920 is an apocalyptic number.

64987000920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64987000920 is an abundant number, since it is smaller than the sum of its proper divisors (164378949480).

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

64987000920 is a wasteful number, since it uses less digits than its factorization.

64987000920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3539634 (or 3539624 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 64987000920 in words is "sixty-four billion, nine hundred eighty-seven million, nine hundred twenty", and thus it is an aban number.