51722615026 has 4 divisors (see below), whose sum is σ = 77583922542. Its totient is φ = 25861307512.

The previous prime is 51722615023. The next prime is 51722615057. The reversal of 51722615026 is 62051622715.

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., 41752792225 + 9969822801 = 204335^2 + 99849^2 .

It is not an unprimeable number, because it can be changed into a prime (51722615023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12930653755 + ... + 12930653758.

Almost surely, 2^51722615026 is an apocalyptic number.

51722615026 is a deficient number, since it is larger than the sum of its proper divisors (25861307516).

51722615026 is a wasteful number, since it uses less digits than its factorization.

51722615026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25861307515.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 51722615026 in words is "fifty-one billion, seven hundred twenty-two million, six hundred fifteen thousand, twenty-six".