155561166057 has 16 divisors (see below), whose sum is σ = 236108648448. Its totient is φ = 90180385680.

The previous prime is 155561166037. The next prime is 155561166077. The reversal of 155561166057 is 750661165551.

It is an interprime number because it is at equal distance from previous prime (155561166037) and next prime (155561166077).

It is not a de Polignac number, because 155561166057 - 2¹⁴ = 155561149673 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155561165997 and 155561166015.

It is not an unprimeable number, because it can be changed into a prime (155561166037) 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, 102476953 + ... + 102478470.

It is an arithmetic number, because the mean of its divisors is an integer number (14756790528).

Almost surely, 2^155561166057 is an apocalyptic number.

It is an amenable number.

155561166057 is a deficient number, since it is larger than the sum of its proper divisors (80547482391).

155561166057 is a wasteful number, since it uses less digits than its factorization.

155561166057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204955460.

The product of its (nonzero) digits is 945000, while the sum is 48.

The spelling of 155561166057 in words is "one hundred fifty-five billion, five hundred sixty-one million, one hundred sixty-six thousand, fifty-seven".