2661121907058 has 16 divisors (see below), whose sum is σ = 5322857857920. Its totient is φ = 886938295056.

The previous prime is 2661121907057. The next prime is 2661121907069. The reversal of 2661121907058 is 8507091211662.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2661121906998 and 2661121907016.

It is not an unprimeable number, because it can be changed into a prime (2661121907051) 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, 25528810 + ... + 25632837.

It is an arithmetic number, because the mean of its divisors is an integer number (332678616120).

Almost surely, 2^{2661121907058} is an apocalyptic number.

2661121907058 is an abundant number, since it is smaller than the sum of its proper divisors (2661735950862).

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

2661121907058 is a wasteful number, since it uses less digits than its factorization.

2661121907058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51170321.

The product of its (nonzero) digits is 362880, while the sum is 48.

The spelling of 2661121907058 in words is "two trillion, six hundred sixty-one billion, one hundred twenty-one million, nine hundred seven thousand, fifty-eight".