2550771561 has 8 divisors (see below), whose sum is σ = 3662646400. Its totient is φ = 1569705552.

The previous prime is 2550771557. The next prime is 2550771571. The reversal of 2550771561 is 1651770552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2550771561 - 2² = 2550771557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 65404399 = 2550771561 / (2 + 5 + 5 + 0 + 7 + 7 + 1 + 5 + 6 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2550771571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32702161 + ... + 32702238.

It is an arithmetic number, because the mean of its divisors is an integer number (457830800).

Almost surely, 2^2550771561 is an apocalyptic number.

It is an amenable number.

2550771561 is a deficient number, since it is larger than the sum of its proper divisors (1111874839).

2550771561 is a wasteful number, since it uses less digits than its factorization.

2550771561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65404415.

The product of its (nonzero) digits is 73500, while the sum is 39.

The square root of 2550771561 is about 50505.1637062984. The cubic root of 2550771561 is about 1366.3349855881.

The spelling of 2550771561 in words is "two billion, five hundred fifty million, seven hundred seventy-one thousand, five hundred sixty-one".