715561749 has 24 divisors (see below), whose sum is σ = 1233169920. Its totient is φ = 408891672.

The previous prime is 715561733. The next prime is 715561787. The reversal of 715561749 is 947165517.

715561749 is a `hidden beast` number, since 7 + 15 + 561 + 74 + 9 = 666.

715561749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 715561749 - 2⁴ = 715561733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (715561729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 269109 + ... + 271754.

It is an arithmetic number, because the mean of its divisors is an integer number (51382080).

Almost surely, 2^715561749 is an apocalyptic number.

It is an amenable number.

715561749 is a deficient number, since it is larger than the sum of its proper divisors (517608171).

715561749 is a wasteful number, since it uses less digits than its factorization.

715561749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540886 (or 540873 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The square root of 715561749 is about 26749.9859626131. The cubic root of 715561749 is about 894.4355226723.

The spelling of 715561749 in words is "seven hundred fifteen million, five hundred sixty-one thousand, seven hundred forty-nine".