2191761275500 has 96 divisors (see below), whose sum is σ = 5005197969408. Its totient is φ = 836862840000.

The previous prime is 2191761275489. The next prime is 2191761275513. The reversal of 2191761275500 is 55721671912.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5404825 + ... + 5796175.

It is an arithmetic number, because the mean of its divisors is an integer number (52137478848).

Almost surely, 2^{2191761275500} is an apocalyptic number.

2191761275500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2191761275500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2502598984704).

2191761275500 is an abundant number, since it is smaller than the sum of its proper divisors (2813436693908).

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

2191761275500 is a wasteful number, since it uses less digits than its factorization.

2191761275500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391880 (or 391868 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 46.

The spelling of 2191761275500 in words is "two trillion, one hundred ninety-one billion, seven hundred sixty-one million, two hundred seventy-five thousand, five hundred".