155709540000 has 1440 divisors, whose sum is σ = 687739852800. Its totient is φ = 33872256000.

The previous prime is 155709539971. The next prime is 155709540011. The reversal of 155709540000 is 45907551.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 782459901 + ... + 782460099.

It is an arithmetic number, because the mean of its divisors is an integer number (477597120).

Almost surely, 2^155709540000 is an apocalyptic number.

155709540000 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 155709540000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343869926400).

155709540000 is an abundant number, since it is smaller than the sum of its proper divisors (532030312800).

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

155709540000 is an equidigital number, since it uses as much as digits as its factorization.

155709540000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

The spelling of 155709540000 in words is "one hundred fifty-five billion, seven hundred nine million, five hundred forty thousand".