155386449456 has 160 divisors (see below), whose sum is σ = 466013744640. Its totient is φ = 43699488768.

The previous prime is 155386449433. The next prime is 155386449457. The reversal of 155386449456 is 654944683551.

It is a self number, because there is not a number n which added to its sum of digits gives 155386449456.

It is not an unprimeable number, because it can be changed into a prime (155386449457) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5630700 + ... + 5658228.

It is an arithmetic number, because the mean of its divisors is an integer number (2912585904).

Almost surely, 2^155386449456 is an apocalyptic number.

155386449456 is a gapful number since it is divisible by the number (16) 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 155386449456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233006872320).

155386449456 is an abundant number, since it is smaller than the sum of its proper divisors (310627295184).

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

155386449456 is a wasteful number, since it uses less digits than its factorization.

155386449456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27811 (or 27805 counting only the distinct ones).

The product of its digits is 62208000, while the sum is 60.

The spelling of 155386449456 in words is "one hundred fifty-five billion, three hundred eighty-six million, four hundred forty-nine thousand, four hundred fifty-six".