155610491 has 16 divisors (see below), whose sum is σ = 165434400. Its totient is φ = 146135808.

The previous prime is 155610473. The next prime is 155610509. The reversal of 155610491 is 194016551.

It is an interprime number because it is at equal distance from previous prime (155610473) and next prime (155610509).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155610491 is a prime.

It is a super-2 number, since 2×155610491² = 48429249818522162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155610461) 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, 210200 + ... + 210938.

It is an arithmetic number, because the mean of its divisors is an integer number (10339650).

Almost surely, 2^155610491 is an apocalyptic number.

155610491 is a deficient number, since it is larger than the sum of its proper divisors (9823909).

155610491 is a wasteful number, since it uses less digits than its factorization.

155610491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 155610491 is about 12474.3934121063. The cubic root of 155610491 is about 537.8728515233.

The spelling of 155610491 in words is "one hundred fifty-five million, six hundred ten thousand, four hundred ninety-one".