19602660091 has 32 divisors (see below), whose sum is σ = 22814747648. Its totient is φ = 16497561600.

The previous prime is 19602660089. The next prime is 19602660149. The reversal of 19602660091 is 19006620691.

It is a cyclic number.

It is not a de Polignac number, because 19602660091 - 2¹ = 19602660089 is a prime.

It is the 140010-th Hogben number.

It is not an unprimeable number, because it can be changed into a prime (19602660391) by changing a digit.

It is a nontrivial repunit in base 140009.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62628151 + ... + 62628463.

It is an arithmetic number, because the mean of its divisors is an integer number (712960864).

Almost surely, 2^19602660091 is an apocalyptic number.

19602660091 is a deficient number, since it is larger than the sum of its proper divisors (3212087557).

19602660091 is a wasteful number, since it uses less digits than its factorization.

19602660091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971.

The product of its (nonzero) digits is 34992, while the sum is 40.

The spelling of 19602660091 in words is "nineteen billion, six hundred two million, six hundred sixty thousand, ninety-one".