31000128025026 has 32 divisors (see below), whose sum is σ = 64723000798080. Its totient is φ = 9879961348224.

The previous prime is 31000128025021. The next prime is 31000128025057. The reversal of 31000128025026 is 62052082100013.

It is a super-2 number, since 2×31000128025026² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31000128024984 and 31000128025002.

It is not an unprimeable number, because it can be changed into a prime (31000128025021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46685515 + ... + 47344878.

It is an arithmetic number, because the mean of its divisors is an integer number (2022593774940).

Almost surely, 2^{31000128025026} is an apocalyptic number.

31000128025026 is an abundant number, since it is smaller than the sum of its proper divisors (33722872773054).

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

31000128025026 is a wasteful number, since it uses less digits than its factorization.

31000128025026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94032810.

The product of its (nonzero) digits is 5760, while the sum is 30.

The spelling of 31000128025026 in words is "thirty-one trillion, one hundred twenty-eight million, twenty-five thousand, twenty-six".