16540444501 has 8 divisors (see below), whose sum is σ = 18917144064. Its totient is φ = 14167189680.

The previous prime is 16540444493. The next prime is 16540444507. The reversal of 16540444501 is 10544404561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16540444501 - 2³ = 16540444493 is a prime.

It is a super-2 number, since 2×16540444501² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16540444507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 850885 + ... + 870106.

It is an arithmetic number, because the mean of its divisors is an integer number (2364643008).

Almost surely, 2^16540444501 is an apocalyptic number.

It is an amenable number.

16540444501 is a deficient number, since it is larger than the sum of its proper divisors (2376699563).

16540444501 is a wasteful number, since it uses less digits than its factorization.

16540444501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722371.

The product of its (nonzero) digits is 38400, while the sum is 34.

It can be divided in two parts, 16540 and 444501, that added together give a square (461041 = 679²).

The spelling of 16540444501 in words is "sixteen billion, five hundred forty million, four hundred forty-four thousand, five hundred one".