77491727255425 has 24 divisors (see below), whose sum is σ = 110061428832000. Its totient is φ = 53018838727680.

The previous prime is 77491727255399. The next prime is 77491727255461. The reversal of 77491727255425 is 52455272719477.

It is a happy number.

It is not a de Polignac number, because 77491727255425 - 2¹⁷ = 77491727124353 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 493028185 + ... + 493185334.

It is an arithmetic number, because the mean of its divisors is an integer number (4585892868000).

Almost surely, 2^{77491727255425} is an apocalyptic number.

It is an amenable number.

77491727255425 is a deficient number, since it is larger than the sum of its proper divisors (32569701576575).

77491727255425 is a wasteful number, since it uses less digits than its factorization.

77491727255425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986213985 (or 986213980 counting only the distinct ones).

The product of its digits is 345744000, while the sum is 67.

The spelling of 77491727255425 in words is "seventy-seven trillion, four hundred ninety-one billion, seven hundred twenty-seven million, two hundred fifty-five thousand, four hundred twenty-five".