124691697138 has 32 divisors (see below), whose sum is σ = 277950536640. Its totient is φ = 37060070400.

The previous prime is 124691697089. The next prime is 124691697161. The reversal of 124691697138 is 831796196421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32168263 + ... + 32172138.

It is an arithmetic number, because the mean of its divisors is an integer number (8685954270).

Almost surely, 2^124691697138 is an apocalyptic number.

124691697138 is an abundant number, since it is smaller than the sum of its proper divisors (153258839502).

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

124691697138 is a wasteful number, since it uses less digits than its factorization.

124691697138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64340442.

The product of its digits is 3919104, while the sum is 57.

The spelling of 124691697138 in words is "one hundred twenty-four billion, six hundred ninety-one million, six hundred ninety-seven thousand, one hundred thirty-eight".