155954049 has 4 divisors (see below), whose sum is σ = 207938736. Its totient is φ = 103969364.

The previous prime is 155954023. The next prime is 155954063. The reversal of 155954049 is 940459551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 940459551 = 3 ⋅313486517.

It is a cyclic number.

It is not a de Polignac number, because 155954049 - 2⁷ = 155953921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155954049.

It is not an unprimeable number, because it can be changed into a prime (155954009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25992339 + ... + 25992344.

It is an arithmetic number, because the mean of its divisors is an integer number (51984684).

Almost surely, 2^155954049 is an apocalyptic number.

It is an amenable number.

155954049 is a deficient number, since it is larger than the sum of its proper divisors (51984687).

155954049 is an equidigital number, since it uses as much as digits as its factorization.

155954049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51984686.

The product of its (nonzero) digits is 162000, while the sum is 42.

The square root of 155954049 is about 12488.1563491174. The cubic root of 155954049 is about 538.2684004621.

The spelling of 155954049 in words is "one hundred fifty-five million, nine hundred fifty-four thousand, forty-nine".