64151955771 has 4 divisors (see below), whose sum is σ = 85535941032. Its totient is φ = 42767970512.

The previous prime is 64151955733. The next prime is 64151955773. The reversal of 64151955771 is 17755915146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64151955771 - 2³⁴ = 46972086587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64151955773) 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, 10691992626 + ... + 10691992631.

It is an arithmetic number, because the mean of its divisors is an integer number (21383985258).

Almost surely, 2^64151955771 is an apocalyptic number.

64151955771 is a deficient number, since it is larger than the sum of its proper divisors (21383985261).

64151955771 is a wasteful number, since it uses less digits than its factorization.

64151955771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21383985260.

The product of its digits is 1323000, while the sum is 51.

The spelling of 64151955771 in words is "sixty-four billion, one hundred fifty-one million, nine hundred fifty-five thousand, seven hundred seventy-one".