122640610460291 has 16 divisors (see below), whose sum is σ = 153576158941440. Its totient is φ = 95143124755680.

The previous prime is 122640610460281. The next prime is 122640610460341. The reversal of 122640610460291 is 192064016046221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 122640610460291 - 2¹⁰ = 122640610459267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122640610460281) 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, 3508209836 + ... + 3508244793.

It is an arithmetic number, because the mean of its divisors is an integer number (9598509933840).

Almost surely, 2^{122640610460291} is an apocalyptic number.

122640610460291 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122640610460291 is a deficient number, since it is larger than the sum of its proper divisors (30935548481149).

122640610460291 is a wasteful number, since it uses less digits than its factorization.

122640610460291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7016454874.

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 122640610460291 in words is "one hundred twenty-two trillion, six hundred forty billion, six hundred ten million, four hundred sixty thousand, two hundred ninety-one".