64272718345 has 32 divisors (see below), whose sum is σ = 90629259264. Its totient is φ = 43269124800.

The previous prime is 64272718339. The next prime is 64272718351. The reversal of 64272718345 is 54381727246.

It is an interprime number because it is at equal distance from previous prime (64272718339) and next prime (64272718351).

It is not a de Polignac number, because 64272718345 - 2³ = 64272718337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 780277 + ... + 858706.

It is an arithmetic number, because the mean of its divisors is an integer number (2832164352).

Almost surely, 2^64272718345 is an apocalyptic number.

It is an amenable number.

64272718345 is a deficient number, since it is larger than the sum of its proper divisors (26356540919).

64272718345 is a wasteful number, since it uses less digits than its factorization.

64272718345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639053.

The product of its digits is 2257920, while the sum is 49.

The spelling of 64272718345 in words is "sixty-four billion, two hundred seventy-two million, seven hundred eighteen thousand, three hundred forty-five".