16405389546 has 32 divisors (see below), whose sum is σ = 40382498688. Its totient is φ = 4326696000.

The previous prime is 16405389529. The next prime is 16405389551. The reversal of 16405389546 is 64598350461.

It is a super-2 number, since 2×16405389546² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15022705 + ... + 15023796.

It is an arithmetic number, because the mean of its divisors is an integer number (1261953084).

Almost surely, 2^16405389546 is an apocalyptic number.

16405389546 is an abundant number, since it is smaller than the sum of its proper divisors (23977109142).

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

16405389546 is a wasteful number, since it uses less digits than its factorization.

16405389546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30046526.

The product of its (nonzero) digits is 3110400, while the sum is 51.

The spelling of 16405389546 in words is "sixteen billion, four hundred five million, three hundred eighty-nine thousand, five hundred forty-six".