715491845 has 4 divisors (see below), whose sum is σ = 858590220. Its totient is φ = 572393472.

The previous prime is 715491839. The next prime is 715491853. The reversal of 715491845 is 548194517.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 363779329 + 351712516 = 19073^2 + 18754^2 .

It is a cyclic number.

It is not a de Polignac number, because 715491845 - 2⁶ = 715491781 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 715491796 and 715491805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71549180 + ... + 71549189.

It is an arithmetic number, because the mean of its divisors is an integer number (214647555).

Almost surely, 2^715491845 is an apocalyptic number.

It is an amenable number.

715491845 is a deficient number, since it is larger than the sum of its proper divisors (143098375).

715491845 is a wasteful number, since it uses less digits than its factorization.

715491845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143098374.

The product of its digits is 201600, while the sum is 44.

The square root of 715491845 is about 26748.6793131923. The cubic root of 715491845 is about 894.4063955998.

The spelling of 715491845 in words is "seven hundred fifteen million, four hundred ninety-one thousand, eight hundred forty-five".