61147980831 has 16 divisors (see below), whose sum is σ = 93350125568. Its totient is φ = 34877109600.

The previous prime is 61147980821. The next prime is 61147980871. The reversal of 61147980831 is 13808974116.

61147980831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61147980831 - 2⁹ = 61147980319 is a prime.

It is a super-2 number, since 2×61147980831² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61147980821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2679775 + ... + 2702496.

It is an arithmetic number, because the mean of its divisors is an integer number (5834382848).

Almost surely, 2^61147980831 is an apocalyptic number.

61147980831 is a deficient number, since it is larger than the sum of its proper divisors (32202144737).

61147980831 is a wasteful number, since it uses less digits than its factorization.

61147980831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5382822.

The product of its (nonzero) digits is 290304, while the sum is 48.

The spelling of 61147980831 in words is "sixty-one billion, one hundred forty-seven million, nine hundred eighty thousand, eight hundred thirty-one".