16400546220 has 48 divisors (see below), whose sum is σ = 46229752800. Its totient is φ = 4344124416.

The previous prime is 16400546203. The next prime is 16400546237. The reversal of 16400546220 is 2264500461.

It is an interprime number because it is at equal distance from previous prime (16400546203) and next prime (16400546237).

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 908317 + ... + 926196.

It is an arithmetic number, because the mean of its divisors is an integer number (963119850).

Almost surely, 2^16400546220 is an apocalyptic number.

16400546220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16400546220 is an abundant number, since it is smaller than the sum of its proper divisors (29829206580).

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

16400546220 is a wasteful number, since it uses less digits than its factorization.

16400546220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834674 (or 1834672 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The spelling of 16400546220 in words is "sixteen billion, four hundred million, five hundred forty-six thousand, two hundred twenty".