77457845 has 8 divisors (see below), whose sum is σ = 93017760. Its totient is φ = 61920720.

The previous prime is 77457791. The next prime is 77457881. The reversal of 77457845 is 54875477.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77457845 - 2¹² = 77453749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77457845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2990 + ... + 12800.

It is an arithmetic number, because the mean of its divisors is an integer number (11627220).

Almost surely, 2^77457845 is an apocalyptic number.

It is an amenable number.

77457845 is a deficient number, since it is larger than the sum of its proper divisors (15559915).

77457845 is a wasteful number, since it uses less digits than its factorization.

77457845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11395.

The product of its digits is 1097600, while the sum is 47.

The square root of 77457845 is about 8801.0138620502. The cubic root of 77457845 is about 426.2736326740.

The spelling of 77457845 in words is "seventy-seven million, four hundred fifty-seven thousand, eight hundred forty-five".