2011951920691 has 8 divisors (see below), whose sum is σ = 2092013115264. Its totient is φ = 1932838196160.

The previous prime is 2011951920661. The next prime is 2011951920701. The reversal of 2011951920691 is 1960291591102.

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

It is a cyclic number.

It is not a de Polignac number, because 2011951920691 - 2²⁹ = 2011415049779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011951920661) 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, 236863180 + ... + 236871673.

It is an arithmetic number, because the mean of its divisors is an integer number (261501639408).

Almost surely, 2^{2011951920691} is an apocalyptic number.

2011951920691 is a deficient number, since it is larger than the sum of its proper divisors (80061194573).

2011951920691 is a wasteful number, since it uses less digits than its factorization.

2011951920691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473735021.

The product of its (nonzero) digits is 87480, while the sum is 46.

The spelling of 2011951920691 in words is "two trillion, eleven billion, nine hundred fifty-one million, nine hundred twenty thousand, six hundred ninety-one".