16550780573761 has 32 divisors (see below), whose sum is σ = 19903556090880. Its totient is φ = 13462252876800.

The previous prime is 16550780573731. The next prime is 16550780573783. The reversal of 16550780573761 is 16737508705561.

It is not a de Polignac number, because 16550780573761 - 2¹³ = 16550780565569 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a self number, because there is not a number n which added to its sum of digits gives 16550780573761.

It is not an unprimeable number, because it can be changed into a prime (16550780573731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15545496 + ... + 16576006.

It is an arithmetic number, because the mean of its divisors is an integer number (621986127840).

Almost surely, 2^{16550780573761} is an apocalyptic number.

It is an amenable number.

16550780573761 is a deficient number, since it is larger than the sum of its proper divisors (3352775517119).

16550780573761 is a wasteful number, since it uses less digits than its factorization.

16550780573761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031905.

The product of its (nonzero) digits is 37044000, while the sum is 61.

The spelling of 16550780573761 in words is "sixteen trillion, five hundred fifty billion, seven hundred eighty million, five hundred seventy-three thousand, seven hundred sixty-one".