78274545 has 32 divisors (see below), whose sum is σ = 133705728. Its totient is φ = 38965248.

The previous prime is 78274531. The next prime is 78274571. The reversal of 78274545 is 54547287.

It is not a de Polignac number, because 78274545 - 2⁵ = 78274513 is a prime.

It is a super-2 number, since 2×78274545² = 12253808789914050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78274497 and 78274506.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31177 + ... + 33593.

It is an arithmetic number, because the mean of its divisors is an integer number (4178304).

Almost surely, 2^78274545 is an apocalyptic number.

It is an amenable number.

78274545 is a deficient number, since it is larger than the sum of its proper divisors (55431183).

78274545 is a wasteful number, since it uses less digits than its factorization.

78274545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2569.

The product of its digits is 313600, while the sum is 42.

The square root of 78274545 is about 8847.2902631258. The cubic root of 78274545 is about 427.7665790563.

The spelling of 78274545 in words is "seventy-eight million, two hundred seventy-four thousand, five hundred forty-five".