31463234378 has 4 divisors (see below), whose sum is σ = 47194851570. Its totient is φ = 15731617188.

The previous prime is 31463234321. The next prime is 31463234389. The reversal of 31463234378 is 87343236413.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24303874609 + 7159359769 = 155897^2 + 84613^2 .

It is a super-2 number, since 2×31463234378² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7865808593 + ... + 7865808596.

Almost surely, 2^31463234378 is an apocalyptic number.

31463234378 is a deficient number, since it is larger than the sum of its proper divisors (15731617192).

31463234378 is a wasteful number, since it uses less digits than its factorization.

31463234378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15731617191.

The product of its digits is 870912, while the sum is 44.

The spelling of 31463234378 in words is "thirty-one billion, four hundred sixty-three million, two hundred thirty-four thousand, three hundred seventy-eight".