77016591 has 6 divisors (see below), whose sum is σ = 111246200. Its totient is φ = 51344388.

The previous prime is 77016571. The next prime is 77016601. The reversal of 77016591 is 19561077.

It is not a de Polignac number, because 77016591 - 2¹⁴ = 77000207 is a prime.

It is a super-2 number, since 2×77016591² = 11863110578522562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77016551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4278691 + ... + 4278708.

Almost surely, 2^77016591 is an apocalyptic number.

77016591 is a deficient number, since it is larger than the sum of its proper divisors (34229609).

77016591 is a wasteful number, since it uses less digits than its factorization.

77016591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8557405 (or 8557402 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 36.

The square root of 77016591 is about 8775.9096964360. The cubic root of 77016591 is about 425.4626399178.

The spelling of 77016591 in words is "seventy-seven million, sixteen thousand, five hundred ninety-one".