31277381406 has 16 divisors (see below), whose sum is σ = 62768263824. Its totient is φ = 10390210304.

The previous prime is 31277381393. The next prime is 31277381413. The reversal of 31277381406 is 60418377213.

It is a congruent number.

It is an unprimeable number.

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, 8893971 + ... + 8897486.

It is an arithmetic number, because the mean of its divisors is an integer number (3923016489).

Almost surely, 2^31277381406 is an apocalyptic number.

31277381406 is an abundant number, since it is smaller than the sum of its proper divisors (31490882418).

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

31277381406 is a wasteful number, since it uses less digits than its factorization.

31277381406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17791755.

The product of its (nonzero) digits is 169344, while the sum is 42.

The spelling of 31277381406 in words is "thirty-one billion, two hundred seventy-seven million, three hundred eighty-one thousand, four hundred six".