51978154379 has 8 divisors (see below), whose sum is σ = 54112996560. Its totient is φ = 49866145056.

The previous prime is 51978154357. The next prime is 51978154387. The reversal of 51978154379 is 97345187915.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51978154379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51938154379) 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, 5703569 + ... + 5712674.

It is an arithmetic number, because the mean of its divisors is an integer number (6764124570).

Almost surely, 2^51978154379 is an apocalyptic number.

51978154379 is a deficient number, since it is larger than the sum of its proper divisors (2134842181).

51978154379 is a wasteful number, since it uses less digits than its factorization.

51978154379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11416429.

The product of its digits is 9525600, while the sum is 59.

The spelling of 51978154379 in words is "fifty-one billion, nine hundred seventy-eight million, one hundred fifty-four thousand, three hundred seventy-nine".