77148232538 has 16 divisors (see below), whose sum is σ = 124628686560. Its totient is φ = 35605556976.

The previous prime is 77148232507. The next prime is 77148232543. The reversal of 77148232538 is 83523284177.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1203953 + ... + 1266411.

It is an arithmetic number, because the mean of its divisors is an integer number (7789292910).

Almost surely, 2^77148232538 is an apocalyptic number.

77148232538 is a deficient number, since it is larger than the sum of its proper divisors (47480454022).

77148232538 is a wasteful number, since it uses less digits than its factorization.

77148232538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109981.

The product of its digits is 2257920, while the sum is 50.

The spelling of 77148232538 in words is "seventy-seven billion, one hundred forty-eight million, two hundred thirty-two thousand, five hundred thirty-eight".