121478904576 has 144 divisors (see below), whose sum is σ = 371622501600. Its totient is φ = 39096594432.

The previous prime is 121478904557. The next prime is 121478904611. The reversal of 121478904576 is 675409874121.

121478904576 is a `hidden beast` number, since 1 + 21 + 47 + 8 + 9 + 0 + 4 + 576 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102571 + ... + 503466.

Almost surely, 2^121478904576 is an apocalyptic number.

121478904576 is a gapful number since it is divisible by the number (16) 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 121478904576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185811250800).

121478904576 is an abundant number, since it is smaller than the sum of its proper divisors (250143597024).

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

121478904576 is an equidigital number, since it uses as much as digits as its factorization.

121478904576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606091 (or 606071 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 121478904576 in words is "one hundred twenty-one billion, four hundred seventy-eight million, nine hundred four thousand, five hundred seventy-six".