77857610137430 has 32 divisors (see below), whose sum is σ = 140236942307616. Its totient is φ = 31122329912064.

The previous prime is 77857610137423. The next prime is 77857610137469. The reversal of 77857610137430 is 3473101675877.

It is a self number, because there is not a number n which added to its sum of digits gives 77857610137430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92405612 + ... + 93244368.

It is an arithmetic number, because the mean of its divisors is an integer number (4382404447113).

Almost surely, 2^{77857610137430} is an apocalyptic number.

77857610137430 is a deficient number, since it is larger than the sum of its proper divisors (62379332170186).

77857610137430 is a wasteful number, since it uses less digits than its factorization.

77857610137430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844928.

The product of its (nonzero) digits is 20744640, while the sum is 59.

The spelling of 77857610137430 in words is "seventy-seven trillion, eight hundred fifty-seven billion, six hundred ten million, one hundred thirty-seven thousand, four hundred thirty".