2045553415521 has 16 divisors (see below), whose sum is σ = 3400400483328. Its totient is φ = 1062625150800.

The previous prime is 2045553415469. The next prime is 2045553415523. The reversal of 2045553415521 is 1255143555402.

It is a happy number.

It is not a de Polignac number, because 2045553415521 - 2¹⁴ = 2045553399137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2045553415523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4427604565 + ... + 4427605026.

It is an arithmetic number, because the mean of its divisors is an integer number (212525030208).

Almost surely, 2^{2045553415521} is an apocalyptic number.

2045553415521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2045553415521 is a deficient number, since it is larger than the sum of its proper divisors (1354847067807).

2045553415521 is a wasteful number, since it uses less digits than its factorization.

2045553415521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8855209612.

The product of its (nonzero) digits is 600000, while the sum is 42.

The spelling of 2045553415521 in words is "two trillion, forty-five billion, five hundred fifty-three million, four hundred fifteen thousand, five hundred twenty-one".