51435123956 has 24 divisors (see below), whose sum is σ = 93190125000. Its totient is φ = 24810799104.

The previous prime is 51435123937. The next prime is 51435123973. The reversal of 51435123956 is 65932153415.

It can be written as a sum of positive squares in 4 ways, for example, as 711075556 + 50724048400 = 26666^2 + 225220^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32621 + ... + 322388.

It is an arithmetic number, because the mean of its divisors is an integer number (3882921875).

Almost surely, 2^51435123956 is an apocalyptic number.

It is an amenable number.

51435123956 is a deficient number, since it is larger than the sum of its proper divisors (41755001044).

51435123956 is a wasteful number, since it uses less digits than its factorization.

51435123956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356291 (or 356289 counting only the distinct ones).

The product of its digits is 486000, while the sum is 44.

The spelling of 51435123956 in words is "fifty-one billion, four hundred thirty-five million, one hundred twenty-three thousand, nine hundred fifty-six".