77373612457 has 4 divisors (see below), whose sum is σ = 77848297360. Its totient is φ = 76898927556.

The previous prime is 77373612413. The next prime is 77373612509. The reversal of 77373612457 is 75421637377.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77373612457 - 2¹¹ = 77373610409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77373615457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237342207 + ... + 237342532.

It is an arithmetic number, because the mean of its divisors is an integer number (19462074340).

Almost surely, 2^77373612457 is an apocalyptic number.

It is an amenable number.

77373612457 is a deficient number, since it is larger than the sum of its proper divisors (474684903).

77373612457 is a wasteful number, since it uses less digits than its factorization.

77373612457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474684902.

The product of its digits is 5186160, while the sum is 52.

The spelling of 77373612457 in words is "seventy-seven billion, three hundred seventy-three million, six hundred twelve thousand, four hundred fifty-seven".