84537364129 has 4 divisors (see below), whose sum is σ = 84540699540. Its totient is φ = 84534028720.

The previous prime is 84537364123. The next prime is 84537364139. The reversal of 84537364129 is 92146373548.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46649520225 + 37887843904 = 215985^2 + 194648^2 .

It is a cyclic number.

It is not a de Polignac number, because 84537364129 - 2⁷ = 84537364001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84537364123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1629394 + ... + 1680475.

It is an arithmetic number, because the mean of its divisors is an integer number (21135174885).

Almost surely, 2^84537364129 is an apocalyptic number.

It is an amenable number.

84537364129 is a deficient number, since it is larger than the sum of its proper divisors (3335411).

84537364129 is a wasteful number, since it uses less digits than its factorization.

84537364129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335410.

The product of its digits is 4354560, while the sum is 52.

The spelling of 84537364129 in words is "eighty-four billion, five hundred thirty-seven million, three hundred sixty-four thousand, one hundred twenty-nine".