64253625455 has 4 divisors (see below), whose sum is σ = 77104350552. Its totient is φ = 51402900360.

The previous prime is 64253625433. The next prime is 64253625473. The reversal of 64253625455 is 55452635246.

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

It is not a de Polignac number, because 64253625455 - 2¹⁰ = 64253624431 is a prime.

It is a super-2 number, since 2×64253625455² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6425362541 + ... + 6425362550.

It is an arithmetic number, because the mean of its divisors is an integer number (19276087638).

Almost surely, 2^64253625455 is an apocalyptic number.

64253625455 is a deficient number, since it is larger than the sum of its proper divisors (12850725097).

64253625455 is a wasteful number, since it uses less digits than its factorization.

64253625455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12850725096.

The product of its digits is 4320000, while the sum is 47.

The spelling of 64253625455 in words is "sixty-four billion, two hundred fifty-three million, six hundred twenty-five thousand, four hundred fifty-five".