51855418416 has 40 divisors (see below), whose sum is σ = 134081418240. Its totient is φ = 17269450816.

The previous prime is 51855418411. The next prime is 51855418421. The reversal of 51855418416 is 61481455815.

It is an interprime number because it is at equal distance from previous prime (51855418411) and next prime (51855418421).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (51855418411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436776 + ... + 542663.

It is an arithmetic number, because the mean of its divisors is an integer number (3352035456).

Almost surely, 2^51855418416 is an apocalyptic number.

It is an amenable number.

51855418416 is an abundant number, since it is smaller than the sum of its proper divisors (82225999824).

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

51855418416 is a wasteful number, since it uses less digits than its factorization.

51855418416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980553 (or 980547 counting only the distinct ones).

The product of its digits is 768000, while the sum is 48.

The spelling of 51855418416 in words is "fifty-one billion, eight hundred fifty-five million, four hundred eighteen thousand, four hundred sixteen".