155400965 has 4 divisors (see below), whose sum is σ = 186481164. Its totient is φ = 124320768.

The previous prime is 155400919. The next prime is 155400997. The reversal of 155400965 is 569004551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 569004551 = 3041 ⋅187111.

It can be written as a sum of positive squares in 2 ways, for example, as 94342369 + 61058596 = 9713^2 + 7814^2 .

It is a cyclic number.

It is not a de Polignac number, because 155400965 - 2⁶ = 155400901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15540092 + ... + 15540101.

It is an arithmetic number, because the mean of its divisors is an integer number (46620291).

Almost surely, 2^155400965 is an apocalyptic number.

It is an amenable number.

155400965 is a deficient number, since it is larger than the sum of its proper divisors (31080199).

155400965 is an equidigital number, since it uses as much as digits as its factorization.

155400965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31080198.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 155400965 is about 12465.9923391602. The cubic root of 155400965 is about 537.6313318885.

The spelling of 155400965 in words is "one hundred fifty-five million, four hundred thousand, nine hundred sixty-five".