51405262401 has 8 divisors (see below), whose sum is σ = 70751329024. Its totient is φ = 33164685360.

The previous prime is 51405262397. The next prime is 51405262411. The reversal of 51405262401 is 10426250415.

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

It is not a de Polignac number, because 51405262401 - 2² = 51405262397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51405262411) 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, 276372286 + ... + 276372471.

It is an arithmetic number, because the mean of its divisors is an integer number (8843916128).

Almost surely, 2^51405262401 is an apocalyptic number.

It is an amenable number.

51405262401 is a deficient number, since it is larger than the sum of its proper divisors (19346066623).

51405262401 is a wasteful number, since it uses less digits than its factorization.

51405262401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552744791.

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 51405262401 in words is "fifty-one billion, four hundred five million, two hundred sixty-two thousand, four hundred one".