84136621527 has 24 divisors (see below), whose sum is σ = 147062331936. Its totient is φ = 45249947136.

The previous prime is 84136621489. The next prime is 84136621661. The reversal of 84136621527 is 72512663148.

84136621527 is a `hidden beast` number, since 8 + 4 + 13 + 6 + 621 + 5 + 2 + 7 = 666.

It is not a de Polignac number, because 84136621527 - 2⁶ = 84136621463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84136621727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39278398 + ... + 39280539.

It is an arithmetic number, because the mean of its divisors is an integer number (6127597164).

Almost surely, 2^84136621527 is an apocalyptic number.

84136621527 is a deficient number, since it is larger than the sum of its proper divisors (62925710409).

84136621527 is a wasteful number, since it uses less digits than its factorization.

84136621527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78558967 (or 78558964 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The spelling of 84136621527 in words is "eighty-four billion, one hundred thirty-six million, six hundred twenty-one thousand, five hundred twenty-seven".