77736521151 has 16 divisors (see below), whose sum is σ = 117974125920. Its totient is φ = 50560338240.

The previous prime is 77736521147. The next prime is 77736521179. The reversal of 77736521151 is 15112563777.

77736521151 is a `hidden beast` number, since 7 + 7 + 73 + 6 + 521 + 1 + 51 = 666.

It is not a de Polignac number, because 77736521151 - 2² = 77736521147 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 77736521097 and 77736521106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77736521111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35110240 + ... + 35112453.

It is an arithmetic number, because the mean of its divisors is an integer number (7373382870).

Almost surely, 2^77736521151 is an apocalyptic number.

77736521151 is a deficient number, since it is larger than the sum of its proper divisors (40237604769).

77736521151 is a wasteful number, since it uses less digits than its factorization.

77736521151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70222743 (or 70222737 counting only the distinct ones).

The product of its digits is 308700, while the sum is 45.

The spelling of 77736521151 in words is "seventy-seven billion, seven hundred thirty-six million, five hundred twenty-one thousand, one hundred fifty-one".