1656377161157 has 16 divisors (see below), whose sum is σ = 1726244578800. Its totient is φ = 1587381519360.

The previous prime is 1656377161141. The next prime is 1656377161189. The reversal of 1656377161157 is 7511617736561.

It can be written as a sum of positive squares in 8 ways, for example, as 129350999716 + 1527026161441 = 359654^2 + 1235729^2 .

It is a cyclic number.

It is not a de Polignac number, because 1656377161157 - 2⁴ = 1656377161141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656377163157) 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, 4091069 + ... + 4477677.

It is an arithmetic number, because the mean of its divisors is an integer number (107890286175).

Almost surely, 2^{1656377161157} is an apocalyptic number.

It is an amenable number.

1656377161157 is a deficient number, since it is larger than the sum of its proper divisors (69867417643).

1656377161157 is a wasteful number, since it uses less digits than its factorization.

1656377161157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387736.

The product of its digits is 5556600, while the sum is 56.

The spelling of 1656377161157 in words is "one trillion, six hundred fifty-six billion, three hundred seventy-seven million, one hundred sixty-one thousand, one hundred fifty-seven".