1656155601 has 6 divisors (see below), whose sum is σ = 2392224770. Its totient is φ = 1104103728.

The previous prime is 1656155587. The next prime is 1656155609. The reversal of 1656155601 is 1065516561.

It can be written as a sum of positive squares in only one way, i.e., 846810000 + 809345601 = 29100^2 + 28449^2 .

It is not a de Polignac number, because 1656155601 - 2⁶ = 1656155537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1656155609) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92008636 + ... + 92008653.

Almost surely, 2^1656155601 is an apocalyptic number.

It is an amenable number.

1656155601 is a deficient number, since it is larger than the sum of its proper divisors (736069169).

1656155601 is a wasteful number, since it uses less digits than its factorization.

1656155601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184017295 (or 184017292 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 1656155601 is about 40695.8916968286. The cubic root of 1656155601 is about 1183.1333941286.

The spelling of 1656155601 in words is "one billion, six hundred fifty-six million, one hundred fifty-five thousand, six hundred one".