51115651629 has 32 divisors (see below), whose sum is σ = 82886860800. Its totient is φ = 27352588032.

The previous prime is 51115651579. The next prime is 51115651649. The reversal of 51115651629 is 92615651115.

It is a happy number.

It is not a de Polignac number, because 51115651629 - 2⁷ = 51115651501 is a prime.

It is a super-2 number, since 2×51115651629² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51115651649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 288709 + ... + 430794.

It is an arithmetic number, because the mean of its divisors is an integer number (2590214400).

Almost surely, 2^51115651629 is an apocalyptic number.

It is an amenable number.

51115651629 is a deficient number, since it is larger than the sum of its proper divisors (31771209171).

51115651629 is a wasteful number, since it uses less digits than its factorization.

51115651629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719729.

The product of its digits is 81000, while the sum is 42.

The spelling of 51115651629 in words is "fifty-one billion, one hundred fifteen million, six hundred fifty-one thousand, six hundred twenty-nine".