121650439680 has 1600 divisors, whose sum is σ = 573244024320. Its totient is φ = 23887872000.

The previous prime is 121650439639. The next prime is 121650439693. The reversal of 121650439680 is 86934056121.

121650439680 is a `hidden beast` number, since 121 + 65 + 0 + 4 + 396 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 303367480 + ... + 303367880.

Almost surely, 2^121650439680 is an apocalyptic number.

121650439680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121650439680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286622012160).

121650439680 is an abundant number, since it is smaller than the sum of its proper divisors (451593584640).

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

121650439680 is a wasteful number, since it uses less digits than its factorization.

121650439680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 121650439680 in words is "one hundred twenty-one billion, six hundred fifty million, four hundred thirty-nine thousand, six hundred eighty".