87138322431045 has 32 divisors (see below), whose sum is σ = 142817901649920. Its totient is φ = 45347551360320.

The previous prime is 87138322431023. The next prime is 87138322431047. The reversal of 87138322431045 is 54013422383178.

It is not a de Polignac number, because 87138322431045 - 2²¹ = 87138320333893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87138322431047) 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, 186474285 + ... + 186940994.

It is an arithmetic number, because the mean of its divisors is an integer number (4463059426560).

Almost surely, 2^{87138322431045} is an apocalyptic number.

It is an amenable number.

87138322431045 is a deficient number, since it is larger than the sum of its proper divisors (55679579218875).

87138322431045 is a wasteful number, since it uses less digits than its factorization.

87138322431045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373415665.

The product of its (nonzero) digits is 3870720, while the sum is 51.

The spelling of 87138322431045 in words is "eighty-seven trillion, one hundred thirty-eight billion, three hundred twenty-two million, four hundred thirty-one thousand, forty-five".