121761605476 has 18 divisors (see below), whose sum is σ = 247871840118. Its totient is φ = 52183545120.

The previous prime is 121761605461. The next prime is 121761605489. The reversal of 121761605476 is 674506167121.

It can be written as a sum of positive squares in only one way, i.e., 121609823076 + 151782400 = 348726^2 + 12320^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 310616145 + ... + 310616536.

Almost surely, 2^121761605476 is an apocalyptic number.

It is an amenable number.

121761605476 is an abundant number, since it is smaller than the sum of its proper divisors (126110234642).

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

121761605476 is a wasteful number, since it uses less digits than its factorization.

121761605476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621232699 (or 621232690 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 121761605476 in words is "one hundred twenty-one billion, seven hundred sixty-one million, six hundred five thousand, four hundred seventy-six".