64249909960 has 32 divisors (see below), whose sum is σ = 146719949760. Its totient is φ = 25316381376.

The previous prime is 64249909949. The next prime is 64249909991. The reversal of 64249909960 is 6990994246.

It is a junction number, because it is equal to n+sod(n) for n = 64249909895 and 64249909904.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11984244 + ... + 11989603.

It is an arithmetic number, because the mean of its divisors is an integer number (4584998430).

Almost surely, 2^64249909960 is an apocalyptic number.

It is an amenable number.

64249909960 is an abundant number, since it is smaller than the sum of its proper divisors (82470039800).

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

64249909960 is a wasteful number, since it uses less digits than its factorization.

64249909960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23973925 (or 23973921 counting only the distinct ones).

The product of its (nonzero) digits is 7558272, while the sum is 58.

The spelling of 64249909960 in words is "sixty-four billion, two hundred forty-nine million, nine hundred nine thousand, nine hundred sixty".