609281507691 has 12 divisors (see below), whose sum is σ = 881865705240. Its totient is φ = 405360402720.

The previous prime is 609281507689. The next prime is 609281507699. The reversal of 609281507691 is 196705182906.

609281507691 is a `hidden beast` number, since 609 + 28 + 1 + 5 + 0 + 7 + 6 + 9 + 1 = 666.

It is not a de Polignac number, because 609281507691 - 2¹ = 609281507689 is a prime.

It is a super-2 number, since 2×609281507691² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (609281507699) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68934426 + ... + 68943263.

It is an arithmetic number, because the mean of its divisors is an integer number (73488808770).

Almost surely, 2^609281507691 is an apocalyptic number.

609281507691 is a deficient number, since it is larger than the sum of its proper divisors (272584197549).

609281507691 is a wasteful number, since it uses less digits than its factorization.

609281507691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137878186 (or 137878183 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 609281507691 in words is "six hundred nine billion, two hundred eighty-one million, five hundred seven thousand, six hundred ninety-one".