31536911145 has 32 divisors (see below), whose sum is σ = 51360215040. Its totient is φ = 16521926400.

The previous prime is 31536911141. The next prime is 31536911183. The reversal of 31536911145 is 54111963513.

It is not a de Polignac number, because 31536911145 - 2² = 31536911141 is a prime.

It is a super-2 number, since 2×31536911145² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31536911141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110451 + ... + 274359.

It is an arithmetic number, because the mean of its divisors is an integer number (1605006720).

Almost surely, 2^31536911145 is an apocalyptic number.

It is an amenable number.

31536911145 is a deficient number, since it is larger than the sum of its proper divisors (19823303895).

31536911145 is a wasteful number, since it uses less digits than its factorization.

31536911145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164145.

The product of its digits is 48600, while the sum is 39.

The spelling of 31536911145 in words is "thirty-one billion, five hundred thirty-six million, nine hundred eleven thousand, one hundred forty-five".