77765351 has 4 divisors (see below), whose sum is σ = 77783400. Its totient is φ = 77747304.

The previous prime is 77765341. The next prime is 77765407. The reversal of 77765351 is 15356777.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15356777 = 227 ⋅67651.

It is a cyclic number.

It is not a de Polignac number, because 77765351 - 2¹⁴ = 77748967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77765299 and 77765308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77765341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1640 + ... + 12578.

It is an arithmetic number, because the mean of its divisors is an integer number (19445850).

Almost surely, 2^77765351 is an apocalyptic number.

77765351 is a deficient number, since it is larger than the sum of its proper divisors (18049).

77765351 is a wasteful number, since it uses less digits than its factorization.

77765351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18048.

The product of its digits is 154350, while the sum is 41.

The square root of 77765351 is about 8818.4664766613. The cubic root of 77765351 is about 426.8369869192.

The spelling of 77765351 in words is "seventy-seven million, seven hundred sixty-five thousand, three hundred fifty-one".