155322440000 has 560 divisors, whose sum is σ = 481506068736. Its totient is φ = 48384000000.

The previous prime is 155322439973. The next prime is 155322440069. The reversal of 155322440000 is 44223551.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (560).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 258439700 + ... + 258440300.

Almost surely, 2^155322440000 is an apocalyptic number.

155322440000 is a gapful number since it is divisible by the number (10) 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 155322440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240753034368).

155322440000 is an abundant number, since it is smaller than the sum of its proper divisors (326183628736).

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

155322440000 is an equidigital number, since it uses as much as digits as its factorization.

155322440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724 (or 699 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 155322440000 its reverse (44223551), we get a palindrome (155366663551).

The spelling of 155322440000 in words is "one hundred fifty-five billion, three hundred twenty-two million, four hundred forty thousand".