64294233691 has 16 divisors (see below), whose sum is σ = 66933771520. Its totient is φ = 61708741920.

The previous prime is 64294233659. The next prime is 64294233701. The reversal of 64294233691 is 19633249246.

It is a happy number.

It is not a de Polignac number, because 64294233691 - 2⁵ = 64294233659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64294233611) 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, 2776720 + ... + 2799778.

It is an arithmetic number, because the mean of its divisors is an integer number (4183360720).

Almost surely, 2^64294233691 is an apocalyptic number.

64294233691 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

64294233691 is a deficient number, since it is larger than the sum of its proper divisors (2639537829).

64294233691 is a wasteful number, since it uses less digits than its factorization.

64294233691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24226.

The product of its digits is 1679616, while the sum is 49.

The spelling of 64294233691 in words is "sixty-four billion, two hundred ninety-four million, two hundred thirty-three thousand, six hundred ninety-one".