51398943457 has 8 divisors (see below), whose sum is σ = 52415304480. Its totient is φ = 50392037280.

The previous prime is 51398943373. The next prime is 51398943461. The reversal of 51398943457 is 75434989315.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51398943457 - 2³⁵ = 17039205089 is a prime.

It is a super-2 number, since 2×51398943457² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51398943487) 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, 2352732 + ... + 2374477.

It is an arithmetic number, because the mean of its divisors is an integer number (6551913060).

Almost surely, 2^51398943457 is an apocalyptic number.

It is an amenable number.

51398943457 is a deficient number, since it is larger than the sum of its proper divisors (1016361023).

51398943457 is a wasteful number, since it uses less digits than its factorization.

51398943457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4727423.

The product of its digits is 16329600, while the sum is 58.

The spelling of 51398943457 in words is "fifty-one billion, three hundred ninety-eight million, nine hundred forty-three thousand, four hundred fifty-seven".