8261550651 has 4 divisors (see below), whose sum is σ = 11015400872. Its totient is φ = 5507700432.

The previous prime is 8261550643. The next prime is 8261550691. The reversal of 8261550651 is 1560551628.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 8261550651 - 2³ = 8261550643 is a prime.

It is a super-3 number, since 3×8261550651³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8261550611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1376925106 + ... + 1376925111.

It is an arithmetic number, because the mean of its divisors is an integer number (2753850218).

Almost surely, 2^8261550651 is an apocalyptic number.

8261550651 is a deficient number, since it is larger than the sum of its proper divisors (2753850221).

8261550651 is a wasteful number, since it uses less digits than its factorization.

8261550651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2753850220.

The product of its (nonzero) digits is 72000, while the sum is 39.

The square root of 8261550651 is about 90893.0726238254. The cubic root of 8261550651 is about 2021.5625797106.

The spelling of 8261550651 in words is "eight billion, two hundred sixty-one million, five hundred fifty thousand, six hundred fifty-one".