155091963 has 32 divisors (see below), whose sum is σ = 229082112. Its totient is φ = 92736000.

The previous prime is 155091961. The next prime is 155091973. The reversal of 155091963 is 369190551.

It is not a de Polignac number, because 155091963 - 2¹ = 155091961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (155091961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 386563 + ... + 386963.

It is an arithmetic number, because the mean of its divisors is an integer number (7158816).

Almost surely, 2^155091963 is an apocalyptic number.

155091963 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

155091963 is a deficient number, since it is larger than the sum of its proper divisors (73990149).

155091963 is a wasteful number, since it uses less digits than its factorization.

155091963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675.

The product of its (nonzero) digits is 36450, while the sum is 39.

The square root of 155091963 is about 12453.5923732873. The cubic root of 155091963 is about 537.2747502547.

The spelling of 155091963 in words is "one hundred fifty-five million, ninety-one thousand, nine hundred sixty-three".