7156556513 has 8 divisors (see below), whose sum is σ = 7492043328. Its totient is φ = 6823097424.

The previous prime is 7156556509. The next prime is 7156556531. The reversal of 7156556513 is 3156556517.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7156556513 - 2² = 7156556509 is a prime.

It is a super-2 number, since 2×7156556513² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7156556503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 499706 + ... + 513827.

It is an arithmetic number, because the mean of its divisors is an integer number (936505416).

Almost surely, 2^7156556513 is an apocalyptic number.

It is an amenable number.

7156556513 is a deficient number, since it is larger than the sum of its proper divisors (335486815).

7156556513 is a wasteful number, since it uses less digits than its factorization.

7156556513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013863.

The product of its digits is 472500, while the sum is 44.

The square root of 7156556513 is about 84596.4332167734. The cubic root of 7156556513 is about 1927.0872071066.

The spelling of 7156556513 in words is "seven billion, one hundred fifty-six million, five hundred fifty-six thousand, five hundred thirteen".