31439479650 has 24 divisors (see below), whose sum is σ = 77969909904. Its totient is φ = 8383861200.

The previous prime is 31439479639. The next prime is 31439479651. The reversal of 31439479650 is 5697493413.

It is a junction number, because it is equal to n+sod(n) for n = 31439479593 and 31439479602.

It is not an unprimeable number, because it can be changed into a prime (31439479651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104798116 + ... + 104798415.

It is an arithmetic number, because the mean of its divisors is an integer number (3248746246).

Almost surely, 2^31439479650 is an apocalyptic number.

31439479650 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31439479650 is an abundant number, since it is smaller than the sum of its proper divisors (46530430254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31439479650 is a wasteful number, since it uses less digits than its factorization.

31439479650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209596546 (or 209596541 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 51.

The spelling of 31439479650 in words is "thirty-one billion, four hundred thirty-nine million, four hundred seventy-nine thousand, six hundred fifty".