77942545 has 8 divisors (see below), whose sum is σ = 94405824. Its totient is φ = 61770864.

The previous prime is 77942539. The next prime is 77942549. The reversal of 77942545 is 54524977.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77942545 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77942549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72309 + ... + 73378.

It is an arithmetic number, because the mean of its divisors is an integer number (11800728).

Almost surely, 2^77942545 is an apocalyptic number.

It is an amenable number.

77942545 is a deficient number, since it is larger than the sum of its proper divisors (16463279).

77942545 is a wasteful number, since it uses less digits than its factorization.

77942545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145799.

The product of its digits is 352800, while the sum is 43.

The square root of 77942545 is about 8828.5075182615. The cubic root of 77942545 is about 427.1609340226.

It can be divided in two parts, 77942 and 545, that added together give a palindrome (78487).

The spelling of 77942545 in words is "seventy-seven million, nine hundred forty-two thousand, five hundred forty-five".