31262061640 has 32 divisors (see below), whose sum is σ = 70349789880. Its totient is φ = 12503020032.

The previous prime is 31262061629. The next prime is 31262061641. The reversal of 31262061640 is 4616026213.

It can be written as a sum of positive squares in 4 ways, for example, as 22642424676 + 8619636964 = 150474^2 + 92842^2 .

It is not an unprimeable number, because it can be changed into a prime (31262061641) 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, 243994 + ... + 349366.

Almost surely, 2^31262061640 is an apocalyptic number.

It is an amenable number.

31262061640 is an abundant number, since it is smaller than the sum of its proper divisors (39087728240).

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

31262061640 is a wasteful number, since it uses less digits than its factorization.

31262061640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112801 (or 112797 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

Adding to 31262061640 its reverse (4616026213), we get a palindrome (35878087853).

The spelling of 31262061640 in words is "thirty-one billion, two hundred sixty-two million, sixty-one thousand, six hundred forty".