31449099687 has 16 divisors (see below), whose sum is σ = 44142908160. Its totient is φ = 19860869952.

The previous prime is 31449099659. The next prime is 31449099701. The reversal of 31449099687 is 78699094413.

It is not a de Polignac number, because 31449099687 - 2⁸ = 31449099431 is a prime.

It is a super-2 number, since 2×31449099687² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31449099687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31449099607) 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, 1101798 + ... + 1129980.

It is an arithmetic number, because the mean of its divisors is an integer number (2758931760).

Almost surely, 2^31449099687 is an apocalyptic number.

31449099687 is a deficient number, since it is larger than the sum of its proper divisors (12693808473).

31449099687 is a wasteful number, since it uses less digits than its factorization.

31449099687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47782.

The product of its (nonzero) digits is 11757312, while the sum is 60.

The spelling of 31449099687 in words is "thirty-one billion, four hundred forty-nine million, ninety-nine thousand, six hundred eighty-seven".