64970841615 has 16 divisors (see below), whose sum is σ = 106370867328. Its totient is φ = 33845275296.

The previous prime is 64970841571. The next prime is 64970841619. The reversal of 64970841615 is 51614807946.

It is not a de Polignac number, because 64970841615 - 2¹¹ = 64970839567 is a prime.

It is a super-2 number, since 2×64970841615² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64970841619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50364349 + ... + 50365638.

It is an arithmetic number, because the mean of its divisors is an integer number (6648179208).

Almost surely, 2^64970841615 is an apocalyptic number.

64970841615 is a deficient number, since it is larger than the sum of its proper divisors (41400025713).

64970841615 is a wasteful number, since it uses less digits than its factorization.

64970841615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100730038.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 64970841615 in words is "sixty-four billion, nine hundred seventy million, eight hundred forty-one thousand, six hundred fifteen".