5451572661 has 4 divisors (see below), whose sum is σ = 7268763552. Its totient is φ = 3634381772.

The previous prime is 5451572657. The next prime is 5451572681. The reversal of 5451572661 is 1662751545.

5451572661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 5451572661 - 2² = 5451572657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5451572681) 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, 908595441 + ... + 908595446.

It is an arithmetic number, because the mean of its divisors is an integer number (1817190888).

Almost surely, 2^5451572661 is an apocalyptic number.

It is an amenable number.

5451572661 is a deficient number, since it is larger than the sum of its proper divisors (1817190891).

5451572661 is a wasteful number, since it uses less digits than its factorization.

5451572661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1817190890.

The product of its digits is 252000, while the sum is 42.

The square root of 5451572661 is about 73834.7659371925. The cubic root of 5451572661 is about 1759.9781183790.

The spelling of 5451572661 in words is "five billion, four hundred fifty-one million, five hundred seventy-two thousand, six hundred sixty-one".