1605155157 has 16 divisors (see below), whose sum is σ = 2395370880. Its totient is φ = 1062290016.

The previous prime is 1605155143. The next prime is 1605155161. The reversal of 1605155157 is 7515515061.

It is a happy number.

1605155157 is a `hidden beast` number, since 1 + 6 + 0 + 51 + 551 + 57 = 666.

It is not a de Polignac number, because 1605155157 - 2⁴ = 1605155141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605155957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213273 + ... + 220670.

It is an arithmetic number, because the mean of its divisors is an integer number (149710680).

Almost surely, 2^1605155157 is an apocalyptic number.

It is an amenable number.

1605155157 is a deficient number, since it is larger than the sum of its proper divisors (790215723).

1605155157 is a wasteful number, since it uses less digits than its factorization.

1605155157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434089 (or 434083 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 36.

The square root of 1605155157 is about 40064.3876403971. The cubic root of 1605155157 is about 1170.8618961462.

The spelling of 1605155157 in words is "one billion, six hundred five million, one hundred fifty-five thousand, one hundred fifty-seven".