16535436720 has 160 divisors (see below), whose sum is σ = 57220694784. Its totient is φ = 3915340800.

The previous prime is 16535436691. The next prime is 16535436727. The reversal of 16535436720 is 2763453561.

It is a super-2 number, since 2×16535436720² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (16535436727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40690 + ... + 186350.

Almost surely, 2^16535436720 is an apocalyptic number.

16535436720 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 16535436720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28610347392).

16535436720 is an abundant number, since it is smaller than the sum of its proper divisors (40685258064).

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

16535436720 is a wasteful number, since it uses less digits than its factorization.

16535436720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145731 (or 145725 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 42.

The spelling of 16535436720 in words is "sixteen billion, five hundred thirty-five million, four hundred thirty-six thousand, seven hundred twenty".