51897209776 has 20 divisors (see below), whose sum is σ = 100615638312. Its totient is φ = 25931883776.

The previous prime is 51897209773. The next prime is 51897209779. The reversal of 51897209776 is 67790279815.

It is an interprime number because it is at equal distance from previous prime (51897209773) and next prime (51897209779).

It is not an unprimeable number, because it can be changed into a prime (51897209773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1019446 + ... + 1069141.

Almost surely, 2^51897209776 is an apocalyptic number.

It is an amenable number.

51897209776 is a deficient number, since it is larger than the sum of its proper divisors (48718428536).

51897209776 is a wasteful number, since it uses less digits than its factorization.

51897209776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090148 (or 2090142 counting only the distinct ones).

The product of its (nonzero) digits is 13335840, while the sum is 61.

The spelling of 51897209776 in words is "fifty-one billion, eight hundred ninety-seven million, two hundred nine thousand, seven hundred seventy-six".