2128609597940 has 48 divisors (see below), whose sum is σ = 5273458627584. Its totient is φ = 706266777600.

The previous prime is 2128609597867. The next prime is 2128609597949. The reversal of 2128609597940 is 497959068212.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128609597949) 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, 245227181 + ... + 245235860.

It is an arithmetic number, because the mean of its divisors is an integer number (109863721408).

Almost surely, 2^{2128609597940} is an apocalyptic number.

2128609597940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2128609597940 is an abundant number, since it is smaller than the sum of its proper divisors (3144849029644).

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

2128609597940 is a wasteful number, since it uses less digits than its factorization.

2128609597940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490463088 (or 490463086 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 62.

The spelling of 2128609597940 in words is "two trillion, one hundred twenty-eight billion, six hundred nine million, five hundred ninety-seven thousand, nine hundred forty".