1655665151 has 4 divisors (see below), whose sum is σ = 1892188752. Its totient is φ = 1419141552.

The previous prime is 1655665127. The next prime is 1655665169. The reversal of 1655665151 is 1515665561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1655665151 - 2³⁰ = 581923327 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1655665099 and 1655665108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655625151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118261790 + ... + 118261803.

It is an arithmetic number, because the mean of its divisors is an integer number (473047188).

Almost surely, 2^1655665151 is an apocalyptic number.

1655665151 is a deficient number, since it is larger than the sum of its proper divisors (236523601).

1655665151 is an equidigital number, since it uses as much as digits as its factorization.

1655665151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236523600.

The product of its digits is 135000, while the sum is 41.

The square root of 1655665151 is about 40689.8654581211. The cubic root of 1655665151 is about 1183.0165924903.

The spelling of 1655665151 in words is "one billion, six hundred fifty-five million, six hundred sixty-five thousand, one hundred fifty-one".