64497622727 has 4 divisors (see below), whose sum is σ = 64500506616. Its totient is φ = 64494738840.

The previous prime is 64497622613. The next prime is 64497622759. The reversal of 64497622727 is 72722679446.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72722679446 = 2 ⋅36361339723.

It is a cyclic number.

It is not a de Polignac number, because 64497622727 - 2¹⁴ = 64497606343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64497622127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1408133 + ... + 1453214.

It is an arithmetic number, because the mean of its divisors is an integer number (16125126654).

Almost surely, 2^64497622727 is an apocalyptic number.

64497622727 is a deficient number, since it is larger than the sum of its proper divisors (2883889).

64497622727 is a wasteful number, since it uses less digits than its factorization.

64497622727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2883888.

The product of its digits is 14224896, while the sum is 56.

The spelling of 64497622727 in words is "sixty-four billion, four hundred ninety-seven million, six hundred twenty-two thousand, seven hundred twenty-seven".