64970249138 has 16 divisors (see below), whose sum is σ = 98717179680. Its totient is φ = 32065218336.

The previous prime is 64970249089. The next prime is 64970249167. The reversal of 64970249138 is 83194207946.

It is a super-2 number, since 2×64970249138² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64970249138.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14081 + ... + 360747.

It is an arithmetic number, because the mean of its divisors is an integer number (6169823730).

Almost surely, 2^64970249138 is an apocalyptic number.

64970249138 is a deficient number, since it is larger than the sum of its proper divisors (33746930542).

64970249138 is a wasteful number, since it uses less digits than its factorization.

64970249138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347881.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 64970249138 in words is "sixty-four billion, nine hundred seventy million, two hundred forty-nine thousand, one hundred thirty-eight".