64507955397 has 16 divisors (see below), whose sum is σ = 88791908352. Its totient is φ = 41614864560.

The previous prime is 64507955339. The next prime is 64507955417. The reversal of 64507955397 is 79355970546.

It is not a de Polignac number, because 64507955397 - 2¹⁶ = 64507889861 is a prime.

It is a super-2 number, since 2×64507955397² (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 64507955397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64507955297) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2240668 + ... + 2269274.

It is an arithmetic number, because the mean of its divisors is an integer number (5549494272).

Almost surely, 2^64507955397 is an apocalyptic number.

It is an amenable number.

64507955397 is a deficient number, since it is larger than the sum of its proper divisors (24283952955).

64507955397 is a wasteful number, since it uses less digits than its factorization.

64507955397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52888.

The product of its (nonzero) digits is 35721000, while the sum is 60.

The spelling of 64507955397 in words is "sixty-four billion, five hundred seven million, nine hundred fifty-five thousand, three hundred ninety-seven".