51556601067 has 4 divisors (see below), whose sum is σ = 68742134760. Its totient is φ = 34371067376.

The previous prime is 51556601039. The next prime is 51556601069. The reversal of 51556601067 is 76010665515.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51556601067 - 2¹¹ = 51556599019 is a prime.

It is a super-2 number, since 2×51556601067² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51556601069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8592766842 + ... + 8592766847.

It is an arithmetic number, because the mean of its divisors is an integer number (17185533690).

Almost surely, 2^51556601067 is an apocalyptic number.

51556601067 is a deficient number, since it is larger than the sum of its proper divisors (17185533693).

51556601067 is a wasteful number, since it uses less digits than its factorization.

51556601067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17185533692.

The product of its (nonzero) digits is 189000, while the sum is 42.

The spelling of 51556601067 in words is "fifty-one billion, five hundred fifty-six million, six hundred one thousand, sixty-seven".