31488649465 has 32 divisors (see below), whose sum is σ = 46626128640. Its totient is φ = 19879928064.

The previous prime is 31488649463. The next prime is 31488649487. The reversal of 31488649465 is 56494688413.

It is a cyclic number.

It is not a de Polignac number, because 31488649465 - 2¹ = 31488649463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31488649463) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88042 + ... + 265948.

It is an arithmetic number, because the mean of its divisors is an integer number (1457066520).

Almost surely, 2^31488649465 is an apocalyptic number.

31488649465 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31488649465 is a deficient number, since it is larger than the sum of its proper divisors (15137479175).

31488649465 is a wasteful number, since it uses less digits than its factorization.

31488649465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178321.

The product of its digits is 19906560, while the sum is 58.

The spelling of 31488649465 in words is "thirty-one billion, four hundred eighty-eight million, six hundred forty-nine thousand, four hundred sixty-five".