74878545 has 16 divisors (see below), whose sum is σ = 136920960. Its totient is φ = 34230144.

The previous prime is 74878519. The next prime is 74878577. The reversal of 74878545 is 54587847.

74878545 = 322² + 323² + ... + 636².

It is not a de Polignac number, because 74878545 - 2⁵ = 74878513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74878494 and 74878503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356460 + ... + 356669.

It is an arithmetic number, because the mean of its divisors is an integer number (8557560).

Almost surely, 2^74878545 is an apocalyptic number.

It is an amenable number.

74878545 is a deficient number, since it is larger than the sum of its proper divisors (62042415).

74878545 is a wasteful number, since it uses less digits than its factorization.

74878545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713144.

The product of its digits is 1254400, while the sum is 48.

The square root of 74878545 is about 8653.2389889567. The cubic root of 74878545 is about 421.4885671824.

The spelling of 74878545 in words is "seventy-four million, eight hundred seventy-eight thousand, five hundred forty-five".