64877625434 has 4 divisors (see below), whose sum is σ = 97316438154. Its totient is φ = 32438812716.

The previous prime is 64877625401. The next prime is 64877625451. The reversal of 64877625434 is 43452677846.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 61372630225 + 3504995209 = 247735^2 + 59203^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64877625434.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16219406357 + ... + 16219406360.

Almost surely, 2^64877625434 is an apocalyptic number.

64877625434 is a deficient number, since it is larger than the sum of its proper divisors (32438812720).

64877625434 is a wasteful number, since it uses less digits than its factorization.

64877625434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32438812719.

The product of its digits is 27095040, while the sum is 56.

The spelling of 64877625434 in words is "sixty-four billion, eight hundred seventy-seven million, six hundred twenty-five thousand, four hundred thirty-four".