16497981500 has 576 divisors, whose sum is σ = 52326787968. Its totient is φ = 4451328000.

The previous prime is 16497981499. The next prime is 16497981509. The reversal of 16497981500 is 518979461.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16497981509) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 59559362 + ... + 59559638.

It is an arithmetic number, because the mean of its divisors is an integer number (90845118).

Almost surely, 2^16497981500 is an apocalyptic number.

16497981500 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 16497981500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26163393984).

16497981500 is an abundant number, since it is smaller than the sum of its proper divisors (35828806468).

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

16497981500 is a wasteful number, since it uses less digits than its factorization.

16497981500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 50.

The spelling of 16497981500 in words is "sixteen billion, four hundred ninety-seven million, nine hundred eighty-one thousand, five hundred".