77742345 has 16 divisors (see below), whose sum is σ = 124856640. Its totient is φ = 41306304.

The previous prime is 77742331. The next prime is 77742347. The reversal of 77742345 is 54324777.

It is not a de Polignac number, because 77742345 - 2¹⁴ = 77725961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77742347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5599 + ... + 13668.

It is an arithmetic number, because the mean of its divisors is an integer number (7803540).

Almost surely, 2^77742345 is an apocalyptic number.

It is an amenable number.

77742345 is a deficient number, since it is larger than the sum of its proper divisors (47114295).

77742345 is a wasteful number, since it uses less digits than its factorization.

77742345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19544.

The product of its digits is 164640, while the sum is 39.

The square root of 77742345 is about 8817.1619583628. The cubic root of 77742345 is about 426.7948911353.

It can be divided in two parts, 77742 and 345, that added together give a palindrome (78087).

The spelling of 77742345 in words is "seventy-seven million, seven hundred forty-two thousand, three hundred forty-five".