1455455521020 has 24 divisors (see below), whose sum is σ = 4075275459024. Its totient is φ = 388121472256.

The previous prime is 1455455521019. The next prime is 1455455521043. The reversal of 1455455521020 is 201255545541.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1455455521020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12128795949 + ... + 12128796068.

It is an arithmetic number, because the mean of its divisors is an integer number (169803144126).

Almost surely, 2^{1455455521020} is an apocalyptic number.

1455455521020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1455455521020 is an abundant number, since it is smaller than the sum of its proper divisors (2619819938004).

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

1455455521020 is a wasteful number, since it uses less digits than its factorization.

1455455521020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24257592029 (or 24257592027 counting only the distinct ones).

The product of its (nonzero) digits is 200000, while the sum is 39.

The spelling of 1455455521020 in words is "one trillion, four hundred fifty-five billion, four hundred fifty-five million, five hundred twenty-one thousand, twenty".