155400161617 has 4 divisors (see below), whose sum is σ = 155415072820. Its totient is φ = 155385250416.

The previous prime is 155400161611. The next prime is 155400161633. The reversal of 155400161617 is 716161004551.

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

It can be written as a sum of positive squares in 2 ways, for example, as 76096532736 + 79303628881 = 275856^2 + 281609^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155400161617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155400161611) 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, 7439958 + ... + 7460815.

It is an arithmetic number, because the mean of its divisors is an integer number (38853768205).

Almost surely, 2^155400161617 is an apocalyptic number.

It is an amenable number.

155400161617 is a deficient number, since it is larger than the sum of its proper divisors (14911203).

155400161617 is a wasteful number, since it uses less digits than its factorization.

155400161617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14911202.

The product of its (nonzero) digits is 25200, while the sum is 37.

The spelling of 155400161617 in words is "one hundred fifty-five billion, four hundred million, one hundred sixty-one thousand, six hundred seventeen".