77491443025 has 144 divisors (see below), whose sum is σ = 109925607168. Its totient is φ = 54020736000.

The previous prime is 77491443017. The next prime is 77491443037. The reversal of 77491443025 is 52034419477.

It is not a de Polignac number, because 77491443025 - 2³ = 77491443017 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1091428740 + ... + 1091428810.

It is an arithmetic number, because the mean of its divisors is an integer number (763372272).

Almost surely, 2^77491443025 is an apocalyptic number.

It is an amenable number.

77491443025 is a deficient number, since it is larger than the sum of its proper divisors (32434164143).

77491443025 is a wasteful number, since it uses less digits than its factorization.

77491443025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 77491443025 in words is "seventy-seven billion, four hundred ninety-one million, four hundred forty-three thousand, twenty-five".