77880545 has 8 divisors (see below), whose sum is σ = 93528000. Its totient is φ = 62256880.

The previous prime is 77880541. The next prime is 77880557. The reversal of 77880545 is 54508877.

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

It is not a de Polignac number, because 77880545 - 2² = 77880541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77880496 and 77880505.

It is not an unprimeable number, because it can be changed into a prime (77880541) 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, 2300 + ... + 12690.

It is an arithmetic number, because the mean of its divisors is an integer number (11691000).

Almost surely, 2^77880545 is an apocalyptic number.

It is an amenable number.

77880545 is a deficient number, since it is larger than the sum of its proper divisors (15647455).

77880545 is a wasteful number, since it uses less digits than its factorization.

77880545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11895.

The product of its (nonzero) digits is 313600, while the sum is 44.

The square root of 77880545 is about 8824.9954674209. The cubic root of 77880545 is about 427.0476411550.

The spelling of 77880545 in words is "seventy-seven million, eight hundred eighty thousand, five hundred forty-five".