16312591144 has 8 divisors (see below), whose sum is σ = 30586108410. Its totient is φ = 8156295568.

The previous prime is 16312591133. The next prime is 16312591187. The reversal of 16312591144 is 44119521361.

It can be written as a sum of positive squares in only one way, i.e., 14366899044 + 1945692100 = 119862^2 + 44110^2 .

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

It is a super-2 number, since 2×16312591144² (a number of 21 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, 1019536939 + ... + 1019536954.

Almost surely, 2^16312591144 is an apocalyptic number.

It is an amenable number.

16312591144 is a deficient number, since it is larger than the sum of its proper divisors (14273517266).

16312591144 is a wasteful number, since it uses less digits than its factorization.

16312591144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039073899 (or 2039073895 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The spelling of 16312591144 in words is "sixteen billion, three hundred twelve million, five hundred ninety-one thousand, one hundred forty-four".