16395551100 has 216 divisors, whose sum is σ = 52427495120. Its totient is φ = 4284887040.

The previous prime is 16395551093. The next prime is 16395551177. The reversal of 16395551100 is 115559361.

16395551100 is a `hidden beast` number, since 1 + 6 + 3 + 95 + 551 + 10 + 0 = 666.

It is a super-2 number, since 2×16395551100² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 9514839 + ... + 9516561.

Almost surely, 2^16395551100 is an apocalyptic number.

16395551100 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 16395551100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26213747560).

16395551100 is an abundant number, since it is smaller than the sum of its proper divisors (36031944020).

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

16395551100 is a wasteful number, since it uses less digits than its factorization.

16395551100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949 (or 1939 counting only the distinct ones).

The product of its (nonzero) digits is 20250, while the sum is 36.

The spelling of 16395551100 in words is "sixteen billion, three hundred ninety-five million, five hundred fifty-one thousand, one hundred".