51061013639 has 8 divisors (see below), whose sum is σ = 51138338160. Its totient is φ = 50983747200.

The previous prime is 51061013621. The next prime is 51061013669. The reversal of 51061013639 is 93631016015.

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 51061013639 - 2²⁸ = 50792578183 is a prime.

It is a super-2 number, since 2×51061013639² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51061013599 and 51061013608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51061013669) 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, 1938719 + ... + 1964879.

It is an arithmetic number, because the mean of its divisors is an integer number (6392292270).

Almost surely, 2^51061013639 is an apocalyptic number.

51061013639 is a deficient number, since it is larger than the sum of its proper divisors (77324521).

51061013639 is a wasteful number, since it uses less digits than its factorization.

51061013639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29041.

The product of its (nonzero) digits is 14580, while the sum is 35.

The spelling of 51061013639 in words is "fifty-one billion, sixty-one million, thirteen thousand, six hundred thirty-nine".