2154145229880 has 64 divisors (see below), whose sum is σ = 7385640791040. Its totient is φ = 492376052352.

The previous prime is 2154145229867. The next prime is 2154145229881. The reversal of 2154145229880 is 889225414512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154145229881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1282228464 + ... + 1282230143.

It is an arithmetic number, because the mean of its divisors is an integer number (115400637360).

Almost surely, 2^{2154145229880} is an apocalyptic number.

2154145229880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2154145229880 is an abundant number, since it is smaller than the sum of its proper divisors (5231495561160).

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

2154145229880 is a wasteful number, since it uses less digits than its factorization.

2154145229880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564458628 (or 2564458624 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 51.

The spelling of 2154145229880 in words is "two trillion, one hundred fifty-four billion, one hundred forty-five million, two hundred twenty-nine thousand, eight hundred eighty".