31402145864 has 32 divisors (see below), whose sum is σ = 60929523000. Its totient is φ = 15154632192.

The previous prime is 31402145839. The next prime is 31402145869. The reversal of 31402145864 is 46854120413.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 29141904100 + 2260241764 = 170710^2 + 47542^2 .

It is not an unprimeable number, because it can be changed into a prime (31402145869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 733892 + ... + 775500.

Almost surely, 2^31402145864 is an apocalyptic number.

It is an amenable number.

31402145864 is a deficient number, since it is larger than the sum of its proper divisors (29527377136).

31402145864 is a wasteful number, since it uses less digits than its factorization.

31402145864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44897 (or 44893 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 38.

The spelling of 31402145864 in words is "thirty-one billion, four hundred two million, one hundred forty-five thousand, eight hundred sixty-four".