7242156745 has 16 divisors (see below), whose sum is σ = 8775573840. Its totient is φ = 5737132800.

The previous prime is 7242156737. The next prime is 7242156767. The reversal of 7242156745 is 5476512427.

It can be written as a sum of positive squares in 8 ways, for example, as 1329623296 + 5912533449 = 36464^2 + 76893^2 .

It is not a de Polignac number, because 7242156745 - 2³ = 7242156737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1294855 + ... + 1300435.

It is an arithmetic number, because the mean of its divisors is an integer number (548473365).

Almost surely, 2^7242156745 is an apocalyptic number.

It is an amenable number.

7242156745 is a deficient number, since it is larger than the sum of its proper divisors (1533417095).

7242156745 is a wasteful number, since it uses less digits than its factorization.

7242156745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8076.

The product of its digits is 470400, while the sum is 43.

The square root of 7242156745 is about 85100.8621871718. The cubic root of 7242156745 is about 1934.7401311794.

The spelling of 7242156745 in words is "seven billion, two hundred forty-two million, one hundred fifty-six thousand, seven hundred forty-five".