16642205461 has 16 divisors (see below), whose sum is σ = 19390942080. Its totient is φ = 13987512000.

The previous prime is 16642205449. The next prime is 16642205467. The reversal of 16642205461 is 16450224661.

It is not a de Polignac number, because 16642205461 - 2⁵ = 16642205429 is a prime.

It is a super-2 number, since 2×16642205461² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16642205461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16642205467) 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, 113211 + ... + 214711.

It is an arithmetic number, because the mean of its divisors is an integer number (1211933880).

Almost surely, 2^16642205461 is an apocalyptic number.

It is an amenable number.

16642205461 is a deficient number, since it is larger than the sum of its proper divisors (2748736619).

16642205461 is a wasteful number, since it uses less digits than its factorization.

16642205461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101964.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 16642205461 in words is "sixteen billion, six hundred forty-two million, two hundred five thousand, four hundred sixty-one".