64956787201 has 4 divisors (see below), whose sum is σ = 64957434304. Its totient is φ = 64956140100.

The previous prime is 64956787171. The next prime is 64956787261. The reversal of 64956787201 is 10278765946.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10278765946 = 2 ⋅5139382973.

It is a cyclic number.

It is not a de Polignac number, because 64956787201 - 2⁵ = 64956787169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64956787261) 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, 137205 + ... + 385666.

It is an arithmetic number, because the mean of its divisors is an integer number (16239358576).

Almost surely, 2^64956787201 is an apocalyptic number.

It is an amenable number.

64956787201 is a deficient number, since it is larger than the sum of its proper divisors (647103).

64956787201 is a wasteful number, since it uses less digits than its factorization.

64956787201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647102.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 64956787201 in words is "sixty-four billion, nine hundred fifty-six million, seven hundred eighty-seven thousand, two hundred one".