2061663551 has 8 divisors (see below), whose sum is σ = 2098648800. Its totient is φ = 2024985600.

The previous prime is 2061663547. The next prime is 2061663577. The reversal of 2061663551 is 1553661602.

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

It is a cyclic number.

It is not a de Polignac number, because 2061663551 - 2² = 2061663547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061663521) 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, 63266 + ... + 90143.

It is an arithmetic number, because the mean of its divisors is an integer number (262331100).

Almost surely, 2^2061663551 is an apocalyptic number.

2061663551 is a deficient number, since it is larger than the sum of its proper divisors (36985249).

2061663551 is a wasteful number, since it uses less digits than its factorization.

2061663551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153649.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 2061663551 is about 45405.5453771893. The cubic root of 2061663551 is about 1272.7387423798.

The spelling of 2061663551 in words is "two billion, sixty-one million, six hundred sixty-three thousand, five hundred fifty-one".