51857625039 has 8 divisors (see below), whose sum is σ = 75429272832. Its totient is φ = 31428863640.

The previous prime is 51857625037. The next prime is 51857625049. The reversal of 51857625039 is 93052675815.

It is a happy number.

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

It is not a de Polignac number, because 51857625039 - 2¹ = 51857625037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51857624982 and 51857625000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51857625037) 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, 785721559 + ... + 785721624.

It is an arithmetic number, because the mean of its divisors is an integer number (9428659104).

Almost surely, 2^51857625039 is an apocalyptic number.

51857625039 is a deficient number, since it is larger than the sum of its proper divisors (23571647793).

51857625039 is a wasteful number, since it uses less digits than its factorization.

51857625039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571443197.

The product of its (nonzero) digits is 2268000, while the sum is 51.

The spelling of 51857625039 in words is "fifty-one billion, eight hundred fifty-seven million, six hundred twenty-five thousand, thirty-nine".