121778496 has 84 divisors (see below), whose sum is σ = 398934432. Its totient is φ = 34792704.

The previous prime is 121778483. The next prime is 121778557. The reversal of 121778496 is 694877121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (84).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11070 + ... + 19133.

Almost surely, 2^121778496 is an apocalyptic number.

121778496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121778496 is an abundant number, since it is smaller than the sum of its proper divisors (277155936).

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

121778496 is a wasteful number, since it uses less digits than its factorization.

121778496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30228 (or 30215 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 121778496 is about 11035.3294468267. The cubic root of 121778496 is about 495.6672238876.

The spelling of 121778496 in words is "one hundred twenty-one million, seven hundred seventy-eight thousand, four hundred ninety-six".