31145057144 has 8 divisors (see below), whose sum is σ = 58396982160. Its totient is φ = 15572528568.

The previous prime is 31145057131. The next prime is 31145057173. The reversal of 31145057144 is 44175054113.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1946566064 + ... + 1946566079.

It is an arithmetic number, because the mean of its divisors is an integer number (7299622770).

Almost surely, 2^31145057144 is an apocalyptic number.

It is an amenable number.

31145057144 is a deficient number, since it is larger than the sum of its proper divisors (27251925016).

31145057144 is a wasteful number, since it uses less digits than its factorization.

31145057144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3893132149 (or 3893132145 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 35.

The spelling of 31145057144 in words is "thirty-one billion, one hundred forty-five million, fifty-seven thousand, one hundred forty-four".