77123911438 has 16 divisors (see below), whose sum is σ = 136771469280. Its totient is φ = 31913342496.

The previous prime is 77123911391. The next prime is 77123911439. The reversal of 77123911438 is 83411932177.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77123911439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94979781 + ... + 94980592.

It is an arithmetic number, because the mean of its divisors is an integer number (8548216830).

Almost surely, 2^77123911438 is an apocalyptic number.

77123911438 is a deficient number, since it is larger than the sum of its proper divisors (59647557842).

77123911438 is a wasteful number, since it uses less digits than its factorization.

77123911438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189960411.

The product of its digits is 254016, while the sum is 46.

The spelling of 77123911438 in words is "seventy-seven billion, one hundred twenty-three million, nine hundred eleven thousand, four hundred thirty-eight".