31457719486 has 4 divisors (see below), whose sum is σ = 47186579232. Its totient is φ = 15728859742.

The previous prime is 31457719457. The next prime is 31457719487. The reversal of 31457719486 is 68491775413.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31457719487) 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 as a sum of consecutive naturals, namely, 7864429870 + ... + 7864429873.

It is an arithmetic number, because the mean of its divisors is an integer number (11796644808).

Almost surely, 2^31457719486 is an apocalyptic number.

31457719486 is a deficient number, since it is larger than the sum of its proper divisors (15728859746).

31457719486 is a wasteful number, since it uses less digits than its factorization.

31457719486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15728859745.

The product of its digits is 5080320, while the sum is 55.

The spelling of 31457719486 in words is "thirty-one billion, four hundred fifty-seven million, seven hundred nineteen thousand, four hundred eighty-six".