16550562420 has 108 divisors (see below), whose sum is σ = 58399872804. Its totient is φ = 3782983680.

The previous prime is 16550562419. The next prime is 16550562467. The reversal of 16550562420 is 2426505561.

16550562420 is a `hidden beast` number, since 1 + 6 + 5 + 5 + 0 + 5 + 624 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6381453456 + 10169108964 = 79884^2 + 100842^2 .

It is a super-2 number, since 2×16550562420² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 929421 + ... + 947060.

It is an arithmetic number, because the mean of its divisors is an integer number (540739563).

Almost surely, 2^16550562420 is an apocalyptic number.

16550562420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16550562420 is an abundant number, since it is smaller than the sum of its proper divisors (41849310384).

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

16550562420 is a wasteful number, since it uses less digits than its factorization.

16550562420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876510 (or 1876498 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 16550562420 in words is "sixteen billion, five hundred fifty million, five hundred sixty-two thousand, four hundred twenty".