2154520035540 has 144 divisors (see below), whose sum is σ = 6740514144000. Its totient is φ = 556746758400.

The previous prime is 2154520035539. The next prime is 2154520035581. The reversal of 2154520035540 is 455300254512.

2154520035540 is a `hidden beast` number, since 2 + 1 + 54 + 52 + 0 + 0 + 3 + 554 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 2154520035495 and 2154520035504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 406290 + ... + 2115209.

It is an arithmetic number, because the mean of its divisors is an integer number (46809126000).

Almost surely, 2^{2154520035540} is an apocalyptic number.

2154520035540 is a gapful number since it is divisible by the number (20) 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 2154520035540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3370257072000).

2154520035540 is an abundant number, since it is smaller than the sum of its proper divisors (4585994108460).

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

2154520035540 is a wasteful number, since it uses less digits than its factorization.

2154520035540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2521662 (or 2521657 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

The spelling of 2154520035540 in words is "two trillion, one hundred fifty-four billion, five hundred twenty million, thirty-five thousand, five hundred forty".