7621070561 has 4 divisors (see below), whose sum is σ = 8207306772. Its totient is φ = 7034834352.

The previous prime is 7621070537. The next prime is 7621070579. The reversal of 7621070561 is 1650701267.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1650701267 = 4703 ⋅350989.

It can be written as a sum of positive squares in 2 ways, for example, as 1020483025 + 6600587536 = 31945^2 + 81244^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7621070561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7621070521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293118086 + ... + 293118111.

It is an arithmetic number, because the mean of its divisors is an integer number (2051826693).

Almost surely, 2^7621070561 is an apocalyptic number.

It is an amenable number.

7621070561 is a deficient number, since it is larger than the sum of its proper divisors (586236211).

7621070561 is a wasteful number, since it uses less digits than its factorization.

7621070561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586236210.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 7621070561 is about 87298.7431811020. The cubic root of 7621070561 is about 1967.9104301647.

The spelling of 7621070561 in words is "seven billion, six hundred twenty-one million, seventy thousand, five hundred sixty-one".