51420402415 has 8 divisors (see below), whose sum is σ = 61867293840. Its totient is φ = 41027781312.

The previous prime is 51420402403. The next prime is 51420402421.

51420402415 is nontrivially palindromic in base 10.

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-51420402415 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13565494 + ... + 13569283.

It is an arithmetic number, because the mean of its divisors is an integer number (7733411730).

Almost surely, 2^51420402415 is an apocalyptic number.

51420402415 is a deficient number, since it is larger than the sum of its proper divisors (10446891425).

51420402415 is a wasteful number, since it uses less digits than its factorization.

51420402415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27135161.

The product of its (nonzero) digits is 6400, while the sum is 28.

The spelling of 51420402415 in words is "fifty-one billion, four hundred twenty million, four hundred two thousand, four hundred fifteen".