16406265440 has 48 divisors (see below), whose sum is σ = 38892199248. Its totient is φ = 6540089856.

The previous prime is 16406265437. The next prime is 16406265443. The reversal of 16406265440 is 4456260461.

It is an interprime number because it is at equal distance from previous prime (16406265437) and next prime (16406265443).

It is a junction number, because it is equal to n+sod(n) for n = 16406265394 and 16406265403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16406265443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128102 + ... + 221861.

It is an arithmetic number, because the mean of its divisors is an integer number (810254151).

Almost surely, 2^16406265440 is an apocalyptic number.

16406265440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16406265440 is an abundant number, since it is smaller than the sum of its proper divisors (22485933808).

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

16406265440 is a wasteful number, since it uses less digits than its factorization.

16406265440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350271 (or 350263 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 16406265440 in words is "sixteen billion, four hundred six million, two hundred sixty-five thousand, four hundred forty".