2191761275641 has 8 divisors (see below), whose sum is σ = 2505144548480. Its totient is φ = 1878446632608.

The previous prime is 2191761275617. The next prime is 2191761275663. The reversal of 2191761275641 is 1465721671912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2191761275641 - 2⁷ = 2191761275513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2191761275611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17088996 + ... + 17216773.

It is an arithmetic number, because the mean of its divisors is an integer number (313143068560).

Almost surely, 2^{2191761275641} is an apocalyptic number.

It is an amenable number.

2191761275641 is a deficient number, since it is larger than the sum of its proper divisors (313383272839).

2191761275641 is an equidigital number, since it uses as much as digits as its factorization.

2191761275641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34314903.

The product of its digits is 1270080, while the sum is 52.

The spelling of 2191761275641 in words is "two trillion, one hundred ninety-one billion, seven hundred sixty-one million, two hundred seventy-five thousand, six hundred forty-one".