121837879646 has 8 divisors (see below), whose sum is σ = 208864936560. Its totient is φ = 52216234128.

The previous prime is 121837879627. The next prime is 121837879661. The reversal of 121837879646 is 646978738121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4351352831 + ... + 4351352858.

It is an arithmetic number, because the mean of its divisors is an integer number (26108117070).

Almost surely, 2^121837879646 is an apocalyptic number.

121837879646 is a deficient number, since it is larger than the sum of its proper divisors (87027056914).

121837879646 is an equidigital number, since it uses as much as digits as its factorization.

121837879646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8702705698.

The product of its digits is 24385536, while the sum is 62.

The spelling of 121837879646 in words is "one hundred twenty-one billion, eight hundred thirty-seven million, eight hundred seventy-nine thousand, six hundred forty-six".