64261285100 has 90 divisors (see below), whose sum is σ = 147223834884. Its totient is φ = 24346706400.

The previous prime is 64261285069. The next prime is 64261285139. The reversal of 64261285100 is 158216246.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 13029635 + ... + 13034565.

Almost surely, 2^64261285100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64261285100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73611917442).

64261285100 is an abundant number, since it is smaller than the sum of its proper divisors (82962549784).

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

64261285100 is an equidigital number, since it uses as much as digits as its factorization.

64261285100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5021 (or 4957 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 64261285100 in words is "sixty-four billion, two hundred sixty-one million, two hundred eighty-five thousand, one hundred".