51961956410 has 48 divisors (see below), whose sum is σ = 117171371016. Its totient is φ = 16445100672.

The previous prime is 51961956377. The next prime is 51961956439. The reversal of 51961956410 is 1465916915.

It can be written as a sum of positive squares in 4 ways, for example, as 41302839361 + 10659117049 = 203231^2 + 103243^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4072277 + ... + 4085016.

Almost surely, 2^51961956410 is an apocalyptic number.

51961956410 is an abundant number, since it is smaller than the sum of its proper divisors (65209414606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51961956410 is a wasteful number, since it uses less digits than its factorization.

51961956410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8157327 (or 8157320 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 47.

The spelling of 51961956410 in words is "fifty-one billion, nine hundred sixty-one million, nine hundred fifty-six thousand, four hundred ten".