16620261400 has 96 divisors (see below), whose sum is σ = 40997376000. Its totient is φ = 6248430720.

The previous prime is 16620261391. The next prime is 16620261407. The reversal of 16620261400 is 416202661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16620261407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 465381 + ... + 499819.

It is an arithmetic number, because the mean of its divisors is an integer number (427056000).

Almost surely, 2^16620261400 is an apocalyptic number.

16620261400 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 16620261400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20498688000).

16620261400 is an abundant number, since it is smaller than the sum of its proper divisors (24377114600).

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

16620261400 is a wasteful number, since it uses less digits than its factorization.

16620261400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34601 (or 34592 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 16620261400 in words is "sixteen billion, six hundred twenty million, two hundred sixty-one thousand, four hundred".