155891072 has 16 divisors (see below), whose sum is σ = 310564500. Its totient is φ = 77945472.

The previous prime is 155891069. The next prime is 155891107. The reversal of 155891072 is 270198551.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608822 + ... + 609077.

Almost surely, 2^155891072 is an apocalyptic number.

It is an amenable number.

155891072 is a deficient number, since it is larger than the sum of its proper divisors (154673428).

155891072 is an equidigital number, since it uses as much as digits as its factorization.

155891072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217913 (or 1217901 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 38.

The square root of 155891072 is about 12485.6346254406. The cubic root of 155891072 is about 538.1959366108.

It can be divided in two parts, 15589 and 1072, that added together give a palindrome (16661).

The spelling of 155891072 in words is "one hundred fifty-five million, eight hundred ninety-one thousand, seventy-two".