1054540021520 has 20 divisors (see below), whose sum is σ = 2451805550220. Its totient is φ = 421816008576.

The previous prime is 1054540021471. The next prime is 1054540021649. The reversal of 1054540021520 is 251200454501.

It can be written as a sum of positive squares in 2 ways, for example, as 795385720336 + 259154301184 = 891844^2 + 509072^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1054540021520² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6590875055 + ... + 6590875214.

It is an arithmetic number, because the mean of its divisors is an integer number (122590277511).

Almost surely, 2^{1054540021520} is an apocalyptic number.

1054540021520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1054540021520 is an abundant number, since it is smaller than the sum of its proper divisors (1397265528700).

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

1054540021520 is a wasteful number, since it uses less digits than its factorization.

1054540021520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13181750282 (or 13181750276 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

The spelling of 1054540021520 in words is "one trillion, fifty-four billion, five hundred forty million, twenty-one thousand, five hundred twenty".