77746445 has 16 divisors (see below), whose sum is σ = 106773120. Its totient is φ = 53237184.

The previous prime is 77746439. The next prime is 77746447. The reversal of 77746445 is 54464777.

It is not a de Polignac number, because 77746445 - 2⁴ = 77746429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77746396 and 77746405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77746447) 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, 37814 + ... + 39816.

It is an arithmetic number, because the mean of its divisors is an integer number (6673320).

Almost surely, 2^77746445 is an apocalyptic number.

It is an amenable number.

77746445 is a deficient number, since it is larger than the sum of its proper divisors (29026675).

77746445 is a wasteful number, since it uses less digits than its factorization.

77746445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3124.

The product of its digits is 658560, while the sum is 44.

The square root of 77746445 is about 8817.3944564140. The cubic root of 77746445 is about 426.8023938173.

The spelling of 77746445 in words is "seventy-seven million, seven hundred forty-six thousand, four hundred forty-five".