77542065 has 24 divisors (see below), whose sum is σ = 135016128. Its totient is φ = 41168160.

The previous prime is 77542063. The next prime is 77542079. The reversal of 77542065 is 56024577.

It is not a de Polignac number, because 77542065 - 2¹ = 77542063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77542061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6420 + ... + 14010.

It is an arithmetic number, because the mean of its divisors is an integer number (5625672).

Almost surely, 2^77542065 is an apocalyptic number.

It is an amenable number.

77542065 is a deficient number, since it is larger than the sum of its proper divisors (57474063).

77542065 is a wasteful number, since it uses less digits than its factorization.

77542065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7829 (or 7826 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The square root of 77542065 is about 8805.7972381835. The cubic root of 77542065 is about 426.4280726431.

The spelling of 77542065 in words is "seventy-seven million, five hundred forty-two thousand, sixty-five".