77342501257 has 12 divisors (see below), whose sum is σ = 90164194176. Its totient is φ = 66150370440.

The previous prime is 77342501231. The next prime is 77342501267. The reversal of 77342501257 is 75210524377.

It is not a de Polignac number, because 77342501257 - 2²³ = 77334112649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77342501207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1681869 + ... + 1727242.

It is an arithmetic number, because the mean of its divisors is an integer number (7513682848).

Almost surely, 2^77342501257 is an apocalyptic number.

It is an amenable number.

77342501257 is a deficient number, since it is larger than the sum of its proper divisors (12821692919).

77342501257 is a wasteful number, since it uses less digits than its factorization.

77342501257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3409588 (or 3409581 counting only the distinct ones).

The product of its (nonzero) digits is 411600, while the sum is 43.

The spelling of 77342501257 in words is "seventy-seven billion, three hundred forty-two million, five hundred one thousand, two hundred fifty-seven".