155513001540 has 192 divisors, whose sum is σ = 501638586624. Its totient is φ = 35656630272.

The previous prime is 155513001529. The next prime is 155513001563. The reversal of 155513001540 is 45100315551.

155513001540 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 155513001498 and 155513001507.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1225767 + ... + 1346673.

It is an arithmetic number, because the mean of its divisors is an integer number (2612700972).

Almost surely, 2^155513001540 is an apocalyptic number.

155513001540 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 155513001540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250819293312).

155513001540 is an abundant number, since it is smaller than the sum of its proper divisors (346125585084).

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

155513001540 is a wasteful number, since it uses less digits than its factorization.

155513001540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121046 (or 121044 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 30.

The spelling of 155513001540 in words is "one hundred fifty-five billion, five hundred thirteen million, one thousand, five hundred forty".