16220505501 has 16 divisors (see below), whose sum is σ = 24053955520. Its totient is φ = 10803060720.

The previous prime is 16220505481. The next prime is 16220505541. The reversal of 16220505501 is 10550502261.

16220505501 is a `hidden beast` number, since 1 + 62 + 2 + 0 + 50 + 550 + 1 = 666.

It is not a de Polignac number, because 16220505501 - 2⁶ = 16220505437 is a prime.

It is a super-2 number, since 2×16220505501² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16220505541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266635 + ... + 321768.

It is an arithmetic number, because the mean of its divisors is an integer number (1503372220).

Almost surely, 2^16220505501 is an apocalyptic number.

It is an amenable number.

16220505501 is a deficient number, since it is larger than the sum of its proper divisors (7833450019).

16220505501 is a wasteful number, since it uses less digits than its factorization.

16220505501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589433 (or 589427 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The spelling of 16220505501 in words is "sixteen billion, two hundred twenty million, five hundred five thousand, five hundred one".