16421757120 has 168 divisors, whose sum is σ = 58940066016. Its totient is φ = 4188721152.

The previous prime is 16421757091. The next prime is 16421757161. The reversal of 16421757120 is 2175712461.

16421757120 is a `hidden beast` number, since 1 + 64 + 2 + 1 + 7 + 571 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57717 + ... + 190196.

Almost surely, 2^16421757120 is an apocalyptic number.

16421757120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16421757120 is an abundant number, since it is smaller than the sum of its proper divisors (42518308896).

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

16421757120 is a wasteful number, since it uses less digits than its factorization.

16421757120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247959 (or 247946 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The spelling of 16421757120 in words is "sixteen billion, four hundred twenty-one million, seven hundred fifty-seven thousand, one hundred twenty".