1656165501 has 16 divisors (see below), whose sum is σ = 2461480320. Its totient is φ = 1100554560.

The previous prime is 1656165499. The next prime is 1656165509. The reversal of 1656165501 is 1055616561.

It is not a de Polignac number, because 1656165501 - 2¹ = 1656165499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656165509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90220 + ... + 107013.

It is an arithmetic number, because the mean of its divisors is an integer number (153842520).

Almost surely, 2^1656165501 is an apocalyptic number.

It is an amenable number.

1656165501 is a deficient number, since it is larger than the sum of its proper divisors (805314819).

1656165501 is a wasteful number, since it uses less digits than its factorization.

1656165501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197553 (or 197547 counting only the distinct ones).

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

The square root of 1656165501 is about 40696.0133305463. The cubic root of 1656165501 is about 1183.1357515957.

The spelling of 1656165501 in words is "one billion, six hundred fifty-six million, one hundred sixty-five thousand, five hundred one".