1656115601 has 8 divisors (see below), whose sum is σ = 1992319680. Its totient is φ = 1344815568.

The previous prime is 1656115577. The next prime is 1656115613. The reversal of 1656115601 is 1065116561.

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 1656115601 - 2¹⁸ = 1655853457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1656115651) 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, 6225866 + ... + 6226131.

It is an arithmetic number, because the mean of its divisors is an integer number (249039960).

Almost surely, 2^1656115601 is an apocalyptic number.

It is an amenable number.

1656115601 is a deficient number, since it is larger than the sum of its proper divisors (336204079).

1656115601 is a wasteful number, since it uses less digits than its factorization.

1656115601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12452023.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 1656115601 is about 40695.4002437622. The cubic root of 1656115601 is about 1183.1238689131.

The spelling of 1656115601 in words is "one billion, six hundred fifty-six million, one hundred fifteen thousand, six hundred one".