77728726054012 has 48 divisors (see below), whose sum is σ = 148947460351200. Its totient is φ = 35198805346560.

The previous prime is 77728726053997. The next prime is 77728726054027. The reversal of 77728726054012 is 21045062782777.

It is an interprime number because it is at equal distance from previous prime (77728726053997) and next prime (77728726054027).

It is a super-2 number, since 2×77728726054012² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 475879414 + ... + 476042722.

It is an arithmetic number, because the mean of its divisors is an integer number (3103072090650).

Almost surely, 2^{77728726054012} is an apocalyptic number.

It is an amenable number.

77728726054012 is a deficient number, since it is larger than the sum of its proper divisors (71218734297188).

77728726054012 is a wasteful number, since it uses less digits than its factorization.

77728726054012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203806 (or 203804 counting only the distinct ones).

The product of its (nonzero) digits is 18439680, while the sum is 58.

The spelling of 77728726054012 in words is "seventy-seven trillion, seven hundred twenty-eight billion, seven hundred twenty-six million, fifty-four thousand, twelve".