121644695946 has 16 divisors (see below), whose sum is σ = 243450422208. Its totient is φ = 40521393600.

The previous prime is 121644695941. The next prime is 121644695947. The reversal of 121644695946 is 649596446121.

It is not an unprimeable number, because it can be changed into a prime (121644695941) 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, 6699775 + ... + 6717906.

It is an arithmetic number, because the mean of its divisors is an integer number (15215651388).

Almost surely, 2^121644695946 is an apocalyptic number.

121644695946 is an abundant number, since it is smaller than the sum of its proper divisors (121805726262).

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

121644695946 is a wasteful number, since it uses less digits than its factorization.

121644695946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13419197.

The product of its digits is 11197440, while the sum is 57.

The spelling of 121644695946 in words is "one hundred twenty-one billion, six hundred forty-four million, six hundred ninety-five thousand, nine hundred forty-six".