31967480618 has 16 divisors (see below), whose sum is σ = 48091131816. Its totient is φ = 15937145280.

The previous prime is 31967480617. The next prime is 31967480621. The reversal of 31967480618 is 81608476913.

It can be written as a sum of positive squares in 4 ways, for example, as 15812308009 + 16155172609 = 125747^2 + 127103^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31967480618.

It is not an unprimeable number, because it can be changed into a prime (31967480617) 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 7 ways as a sum of consecutive naturals, for example, 1719380 + ... + 1737872.

Almost surely, 2^31967480618 is an apocalyptic number.

31967480618 is a deficient number, since it is larger than the sum of its proper divisors (16123651198).

31967480618 is a wasteful number, since it uses less digits than its factorization.

31967480618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20969.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The spelling of 31967480618 in words is "thirty-one billion, nine hundred sixty-seven million, four hundred eighty thousand, six hundred eighteen".