10520543421520 has 80 divisors (see below), whose sum is σ = 27136193797440. Its totient is φ = 3760810572800.

The previous prime is 10520543421503. The next prime is 10520543421551. The reversal of 10520543421520 is 2512434502501.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×10520543421520² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101263021 + ... + 101366860.

It is an arithmetic number, because the mean of its divisors is an integer number (339202422468).

Almost surely, 2^{10520543421520} is an apocalyptic number.

10520543421520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10520543421520 is an abundant number, since it is smaller than the sum of its proper divisors (16615650375920).

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

10520543421520 is a wasteful number, since it uses less digits than its factorization.

10520543421520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202629964 (or 202629958 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 10520543421520 in words is "ten trillion, five hundred twenty billion, five hundred forty-three million, four hundred twenty-one thousand, five hundred twenty".