64813409502 has 16 divisors (see below), whose sum is σ = 129752317200. Its totient is φ = 21583553472.

The previous prime is 64813409473. The next prime is 64813409503. The reversal of 64813409502 is 20590431846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64813409503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5222377 + ... + 5234772.

It is an arithmetic number, because the mean of its divisors is an integer number (8109519825).

Almost surely, 2^64813409502 is an apocalyptic number.

64813409502 is an abundant number, since it is smaller than the sum of its proper divisors (64938907698).

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

64813409502 is a wasteful number, since it uses less digits than its factorization.

64813409502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10458187.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 64813409502 in words is "sixty-four billion, eight hundred thirteen million, four hundred nine thousand, five hundred two".