121772047646 has 16 divisors (see below), whose sum is σ = 184514410080. Its totient is φ = 60270270720.

The previous prime is 121772047601. The next prime is 121772047703. The reversal of 121772047646 is 646740277121.

It is a self number, because there is not a number n which added to its sum of digits gives 121772047646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 675911 + ... + 836898.

It is an arithmetic number, because the mean of its divisors is an integer number (11532150630).

Almost surely, 2^121772047646 is an apocalyptic number.

121772047646 is a deficient number, since it is larger than the sum of its proper divisors (62742362434).

121772047646 is a wasteful number, since it uses less digits than its factorization.

121772047646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513219.

The product of its (nonzero) digits is 790272, while the sum is 47.

The spelling of 121772047646 in words is "one hundred twenty-one billion, seven hundred seventy-two million, forty-seven thousand, six hundred forty-six".