31261463560 has 128 divisors (see below), whose sum is σ = 72124680960. Its totient is φ = 12192768000.

The previous prime is 31261463551. The next prime is 31261463567. The reversal of 31261463560 is 6536416213.

It is not an unprimeable number, because it can be changed into a prime (31261463567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111250620 + ... + 111250900.

It is an arithmetic number, because the mean of its divisors is an integer number (563474070).

Almost surely, 2^31261463560 is an apocalyptic number.

It is an amenable number.

31261463560 is an abundant number, since it is smaller than the sum of its proper divisors (40863217400).

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

31261463560 is a wasteful number, since it uses less digits than its factorization.

31261463560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719 (or 715 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

Adding to 31261463560 its reverse (6536416213), we get a palindrome (37797879773).

The spelling of 31261463560 in words is "thirty-one billion, two hundred sixty-one million, four hundred sixty-three thousand, five hundred sixty".