61279129824731 has 24 divisors (see below), whose sum is σ = 76772445334704. Its totient is φ = 48481312259520.

The previous prime is 61279129824719. The next prime is 61279129824733. The reversal of 61279129824731 is 13742892197216.

It is not a de Polignac number, because 61279129824731 - 2³⁰ = 61278056082907 is a prime.

It is a super-3 number, since 3×61279129824731³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (61279129824733) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6214421 + ... + 12695561.

It is an arithmetic number, because the mean of its divisors is an integer number (3198851888946).

Almost surely, 2^{61279129824731} is an apocalyptic number.

61279129824731 is a deficient number, since it is larger than the sum of its proper divisors (15493315509973).

61279129824731 is a wasteful number, since it uses less digits than its factorization.

61279129824731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6496011 (or 6496004 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 62.

The spelling of 61279129824731 in words is "sixty-one trillion, two hundred seventy-nine billion, one hundred twenty-nine million, eight hundred twenty-four thousand, seven hundred thirty-one".