12045971550 has 24 divisors (see below), whose sum is σ = 29874009816. Its totient is φ = 3212259040.

The previous prime is 12045971543. The next prime is 12045971551. The reversal of 12045971550 is 5517954021.

It is a junction number, because it is equal to n+sod(n) for n = 12045971499 and 12045971508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12045971551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40153089 + ... + 40153388.

It is an arithmetic number, because the mean of its divisors is an integer number (1244750409).

Almost surely, 2^12045971550 is an apocalyptic number.

12045971550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12045971550 is an abundant number, since it is smaller than the sum of its proper divisors (17828038266).

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

12045971550 is a wasteful number, since it uses less digits than its factorization.

12045971550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80306492 (or 80306487 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 39.

The spelling of 12045971550 in words is "twelve billion, forty-five million, nine hundred seventy-one thousand, five hundred fifty".