61319123631 has 16 divisors (see below), whose sum is σ = 93975669600. Its totient is φ = 39469780224.

The previous prime is 61319123629. The next prime is 61319123651. The reversal of 61319123631 is 13632191316.

It is a happy number.

61319123631 is a `hidden beast` number, since 6 + 1 + 3 + 1 + 9 + 12 + 3 + 631 = 666.

It is not a de Polignac number, because 61319123631 - 2¹ = 61319123629 is a prime.

It is a super-2 number, since 2×61319123631² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61319123651) 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, 39155746 + ... + 39157311.

It is an arithmetic number, because the mean of its divisors is an integer number (5873479350).

Almost surely, 2^61319123631 is an apocalyptic number.

61319123631 is a deficient number, since it is larger than the sum of its proper divisors (32656545969).

61319123631 is a wasteful number, since it uses less digits than its factorization.

61319123631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78313095 (or 78313089 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The spelling of 61319123631 in words is "sixty-one billion, three hundred nineteen million, one hundred twenty-three thousand, six hundred thirty-one".