155444158464 has 224 divisors, whose sum is σ = 486528441216. Its totient is φ = 43210506240.

The previous prime is 155444158453. The next prime is 155444158477. The reversal of 155444158464 is 464851444551.

It is a tau number, because it is divible by the number of its divisors (224).

It is a super-2 number, since 2×155444158464² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6352974 + ... + 6377394.

Almost surely, 2^155444158464 is an apocalyptic number.

155444158464 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155444158464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243264220608).

155444158464 is an abundant number, since it is smaller than the sum of its proper divisors (331084282752).

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

155444158464 is an equidigital number, since it uses as much as digits as its factorization.

155444158464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24494 (or 24470 counting only the distinct ones).

The product of its digits is 6144000, while the sum is 51.

The spelling of 155444158464 in words is "one hundred fifty-five billion, four hundred forty-four million, one hundred fifty-eight thousand, four hundred sixty-four".