121645890736 has 40 divisors (see below), whose sum is σ = 236827748304. Its totient is φ = 60529766400.

The previous prime is 121645890713. The next prime is 121645890767. The reversal of 121645890736 is 637098546121.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

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, 2756235 + ... + 2800021.

It is a 1-persistent number, because it is pandigital, but 2⋅121645890736 = 243291781472 is not.

Almost surely, 2^121645890736 is an apocalyptic number.

121645890736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121645890736 is a deficient number, since it is larger than the sum of its proper divisors (115181857568).

121645890736 is a wasteful number, since it uses less digits than its factorization.

121645890736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44629 (or 44623 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 121645890736 in words is "one hundred twenty-one billion, six hundred forty-five million, eight hundred ninety thousand, seven hundred thirty-six".