51779916 has 36 divisors (see below), whose sum is σ = 131254032. Its totient is φ = 17211744.

The previous prime is 51779899. The next prime is 51779929. The reversal of 51779916 is 61997715.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12481 + ... + 16103.

Almost surely, 2^51779916 is an apocalyptic number.

It is an amenable number.

51779916 is an abundant number, since it is smaller than the sum of its proper divisors (79474116).

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

51779916 is a wasteful number, since it uses less digits than its factorization.

51779916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030 (or 4025 counting only the distinct ones).

The product of its digits is 119070, while the sum is 45.

The square root of 51779916 is about 7195.8262902880. The cubic root of 51779916 is about 372.7237902727.

The spelling of 51779916 in words is "fifty-one million, seven hundred seventy-nine thousand, nine hundred sixteen".