31545394731712 has 112 divisors (see below), whose sum is σ = 68169236889600. Its totient is φ = 14426329236480.

The previous prime is 31545394731691. The next prime is 31545394731713. The reversal of 31545394731712 is 21713749354513.

It is a super-2 number, since 2×31545394731712² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31545394731713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1010051137 + ... + 1010082367.

It is an arithmetic number, because the mean of its divisors is an integer number (608653900800).

Almost surely, 2^{31545394731712} is an apocalyptic number.

31545394731712 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31545394731712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34084618444800).

31545394731712 is an abundant number, since it is smaller than the sum of its proper divisors (36623842157888).

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

31545394731712 is a wasteful number, since it uses less digits than its factorization.

31545394731712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59934 (or 59924 counting only the distinct ones).

The product of its digits is 9525600, while the sum is 55.

The spelling of 31545394731712 in words is "thirty-one trillion, five hundred forty-five billion, three hundred ninety-four million, seven hundred thirty-one thousand, seven hundred twelve".