7156990801 has 9 divisors (see below), whose sum is σ = 7398019803. Its totient is φ = 6923582160.

The previous prime is 7156990781. The next prime is 7156990807. The reversal of 7156990801 is 1080996517.

It is a happy number.

The square root of 7156990801 is 84599.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 6897136401 + 259854400 = 83049^2 + 16120^2 .

It is not a de Polignac number, because 7156990801 - 2⁹ = 7156990289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7156990807) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2621205 + ... + 2623933.

Almost surely, 2^7156990801 is an apocalyptic number.

7156990801 is the 84599-th square number.

7156990801 is the 42300-th centered octagonal number.

It is an amenable number.

7156990801 is a deficient number, since it is larger than the sum of its proper divisors (241029002).

7156990801 is an frugal number, since it uses more digits than its factorization.

7156990801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5520 (or 2760 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 46.

The cubic root of 7156990801 is about 1927.1261873955.

The spelling of 7156990801 in words is "seven billion, one hundred fifty-six million, nine hundred ninety thousand, eight hundred one".