155409954 has 32 divisors (see below), whose sum is σ = 376119936. Its totient is φ = 41790720.

The previous prime is 155409907. The next prime is 155409959. The reversal of 155409954 is 459904551.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (155409959) 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, 108117 + ... + 109544.

It is an arithmetic number, because the mean of its divisors is an integer number (11753748).

Almost surely, 2^155409954 is an apocalyptic number.

155409954 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

155409954 is an abundant number, since it is smaller than the sum of its proper divisors (220709982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155409954 is a wasteful number, since it uses less digits than its factorization.

155409954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217690.

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

The square root of 155409954 is about 12466.3528748387. The cubic root of 155409954 is about 537.6416979221.

The spelling of 155409954 in words is "one hundred fifty-five million, four hundred nine thousand, nine hundred fifty-four".