16172785944 has 480 divisors, whose sum is σ = 54748386000. Its totient is φ = 4445134848.

The previous prime is 16172785903. The next prime is 16172785957. The reversal of 16172785944 is 44958727161.

16172785944 is a `hidden beast` number, since 16 + 17 + 27 + 8 + 594 + 4 = 666.

It is a super-2 number, since 2×16172785944² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 166729704 + ... + 166729800.

Almost surely, 2^16172785944 is an apocalyptic number.

16172785944 is a gapful number since it is divisible by the number (14) 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 16172785944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27374193000).

16172785944 is an abundant number, since it is smaller than the sum of its proper divisors (38575600056).

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

16172785944 is a wasteful number, since it uses less digits than its factorization.

16172785944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 257 counting only the distinct ones).

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

The spelling of 16172785944 in words is "sixteen billion, one hundred seventy-two million, seven hundred eighty-five thousand, nine hundred forty-four".