1655556601 has 16 divisors (see below), whose sum is σ = 1744167168. Its totient is φ = 1569672000.

The previous prime is 1655556599. The next prime is 1655556641. The reversal of 1655556601 is 1066555561.

It is a cyclic number.

It is not a de Polignac number, because 1655556601 - 2¹ = 1655556599 is a prime.

It is a super-2 number, since 2×1655556601² = 5481735318229346402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1655556641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293316 + ... + 298906.

It is an arithmetic number, because the mean of its divisors is an integer number (109010448).

Almost surely, 2^1655556601 is an apocalyptic number.

It is an amenable number.

1655556601 is a deficient number, since it is larger than the sum of its proper divisors (88610567).

1655556601 is a wasteful number, since it uses less digits than its factorization.

1655556601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5832.

The product of its (nonzero) digits is 135000, while the sum is 40.

The square root of 1655556601 is about 40688.5315660322. The cubic root of 1655556601 is about 1182.9907379754.

The spelling of 1655556601 in words is "one billion, six hundred fifty-five million, five hundred fifty-six thousand, six hundred one".