155861454 has 48 divisors (see below), whose sum is σ = 366208128. Its totient is φ = 44090928.

The previous prime is 155861449. The next prime is 155861473. The reversal of 155861454 is 454168551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27709 + ... + 32855.

It is an arithmetic number, because the mean of its divisors is an integer number (7629336).

Almost surely, 2^155861454 is an apocalyptic number.

155861454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 155861454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183104064).

155861454 is an abundant number, since it is smaller than the sum of its proper divisors (210346674).

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

155861454 is a wasteful number, since it uses less digits than its factorization.

155861454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5269 (or 5262 counting only the distinct ones).

The product of its digits is 96000, while the sum is 39.

The square root of 155861454 is about 12484.4484860165. The cubic root of 155861454 is about 538.1618502096.

The spelling of 155861454 in words is "one hundred fifty-five million, eight hundred sixty-one thousand, four hundred fifty-four".