7161880657 has 4 divisors (see below), whose sum is σ = 7165981936. Its totient is φ = 7157779380.

The previous prime is 7161880631. The next prime is 7161880669. The reversal of 7161880657 is 7560881617.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7560881617 = 31 ⋅243899407.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7161880657 is a prime.

It is a super-2 number, since 2×7161880657² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7161880657.

It is not an unprimeable number, because it can be changed into a prime (7161880157) 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, 2048019 + ... + 2051512.

It is an arithmetic number, because the mean of its divisors is an integer number (1791495484).

Almost surely, 2^7161880657 is an apocalyptic number.

It is an amenable number.

7161880657 is a deficient number, since it is larger than the sum of its proper divisors (4101279).

7161880657 is a wasteful number, since it uses less digits than its factorization.

7161880657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4101278.

The product of its (nonzero) digits is 564480, while the sum is 49.

The square root of 7161880657 is about 84627.8952650957. The cubic root of 7161880657 is about 1927.5649762908.

The spelling of 7161880657 in words is "seven billion, one hundred sixty-one million, eight hundred eighty thousand, six hundred fifty-seven".