8542691641 has 16 divisors (see below), whose sum is σ = 9886546368. Its totient is φ = 7295142400.

The previous prime is 8542691627. The next prime is 8542691657. The reversal of 8542691641 is 1461962458.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 8542691641 - 2⁷ = 8542691513 is a prime.

It is a super-2 number, since 2×8542691641² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8542691591 and 8542691600.

It is not an unprimeable number, because it can be changed into a prime (8542641641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53586 + ... + 141268.

It is an arithmetic number, because the mean of its divisors is an integer number (617909148).

Almost surely, 2^8542691641 is an apocalyptic number.

It is an amenable number.

8542691641 is a deficient number, since it is larger than the sum of its proper divisors (1343854727).

8542691641 is a wasteful number, since it uses less digits than its factorization.

8542691641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88232.

The product of its digits is 414720, while the sum is 46.

The square root of 8542691641 is about 92426.6825164682. The cubic root of 8542691641 is about 2044.2385634118.

The spelling of 8542691641 in words is "eight billion, five hundred forty-two million, six hundred ninety-one thousand, six hundred forty-one".