64212172375 has 16 divisors (see below), whose sum is σ = 86301161856. Its totient is φ = 47418218400.

The previous prime is 64212172333. The next prime is 64212172397. The reversal of 64212172375 is 57327121246.

It is not a de Polignac number, because 64212172375 - 2¹¹ = 64212170327 is a prime.

It is a super-2 number, since 2×64212172375² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19755967 + ... + 19759216.

It is an arithmetic number, because the mean of its divisors is an integer number (5393822616).

Almost surely, 2^64212172375 is an apocalyptic number.

64212172375 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

64212172375 is a deficient number, since it is larger than the sum of its proper divisors (22088989481).

64212172375 is a wasteful number, since it uses less digits than its factorization.

64212172375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39515211 (or 39515201 counting only the distinct ones).

The product of its digits is 141120, while the sum is 40.

The spelling of 64212172375 in words is "sixty-four billion, two hundred twelve million, one hundred seventy-two thousand, three hundred seventy-five".