121766353770637 has 16 divisors (see below), whose sum is σ = 126069884987904. Its totient is φ = 117486311040000.

The previous prime is 121766353770623. The next prime is 121766353770667. The reversal of 121766353770637 is 736077353667121.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121766353770637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121766353770667) 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, 701126262 + ... + 701299912.

It is an arithmetic number, because the mean of its divisors is an integer number (7879367811744).

Almost surely, 2^{121766353770637} is an apocalyptic number.

It is an amenable number.

121766353770637 is a deficient number, since it is larger than the sum of its proper divisors (4303531217267).

121766353770637 is a wasteful number, since it uses less digits than its factorization.

121766353770637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241140.

The product of its (nonzero) digits is 140026320, while the sum is 64.

The spelling of 121766353770637 in words is "one hundred twenty-one trillion, seven hundred sixty-six billion, three hundred fifty-three million, seven hundred seventy thousand, six hundred thirty-seven".