2157092661 has 8 divisors (see below), whose sum is σ = 2876339520. Its totient is φ = 1437953792.

The previous prime is 2157092657. The next prime is 2157092681. The reversal of 2157092661 is 1662907512.

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 2157092661 - 2² = 2157092657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157092621) 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, 56560 + ... + 86678.

It is an arithmetic number, because the mean of its divisors is an integer number (359542440).

Almost surely, 2^2157092661 is an apocalyptic number.

It is an amenable number.

2157092661 is a deficient number, since it is larger than the sum of its proper divisors (719246859).

2157092661 is a wasteful number, since it uses less digits than its factorization.

2157092661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53995.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 2157092661 is about 46444.5116348530. The cubic root of 2157092661 is about 1292.0805839838.

The spelling of 2157092661 in words is "two billion, one hundred fifty-seven million, ninety-two thousand, six hundred sixty-one".