64861256761795 has 16 divisors (see below), whose sum is σ = 84881722584960. Its totient is φ = 47291245432704.

The previous prime is 64861256761783. The next prime is 64861256761867. The reversal of 64861256761795 is 59716765216846.

It is not a de Polignac number, because 64861256761795 - 2⁷ = 64861256761667 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6315599224 + ... + 6315609493.

It is an arithmetic number, because the mean of its divisors is an integer number (5305107661560).

Almost surely, 2^{64861256761795} is an apocalyptic number.

64861256761795 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

64861256761795 is a deficient number, since it is larger than the sum of its proper divisors (20020465823165).

64861256761795 is a wasteful number, since it uses less digits than its factorization.

64861256761795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12631208814.

The product of its digits is 914457600, while the sum is 73.

The spelling of 64861256761795 in words is "sixty-four trillion, eight hundred sixty-one billion, two hundred fifty-six million, seven hundred sixty-one thousand, seven hundred ninety-five".