155424243552 has 96 divisors (see below), whose sum is σ = 413405959680. Its totient is φ = 51120975360.

The previous prime is 155424243539. The next prime is 155424243589. The reversal of 155424243552 is 255342424551.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×155424243552² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 14639398 + ... + 14650010.

It is an arithmetic number, because the mean of its divisors is an integer number (4306312080).

Almost surely, 2^155424243552 is an apocalyptic number.

155424243552 is a gapful number since it is divisible by the number (12) 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 155424243552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206702979840).

155424243552 is an abundant number, since it is smaller than the sum of its proper divisors (257981716128).

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

155424243552 is a wasteful number, since it uses less digits than its factorization.

155424243552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12636 (or 12628 counting only the distinct ones).

The product of its digits is 960000, while the sum is 42.

The spelling of 155424243552 in words is "one hundred fifty-five billion, four hundred twenty-four million, two hundred forty-three thousand, five hundred fifty-two".