2145545454 has 32 divisors (see below), whose sum is σ = 4780530720. Its totient is φ = 637402752.

The previous prime is 2145545447. The next prime is 2145545471. The reversal of 2145545454 is 4545455412.

It is a super-2 number, since 2×2145545454² = 9206730590360132232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 471997 + ... + 476520.

It is an arithmetic number, because the mean of its divisors is an integer number (149391585).

Almost surely, 2^2145545454 is an apocalyptic number.

2145545454 is an abundant number, since it is smaller than the sum of its proper divisors (2634985266).

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

2145545454 is a wasteful number, since it uses less digits than its factorization.

2145545454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948564.

The product of its digits is 320000, while the sum is 39.

The square root of 2145545454 is about 46320.0329663095. The cubic root of 2145545454 is about 1289.7708973586.

The spelling of 2145545454 in words is "two billion, one hundred forty-five million, five hundred forty-five thousand, four hundred fifty-four".