61523166909 has 8 divisors (see below), whose sum is σ = 82392259680. Its totient is φ = 40834759376.

The previous prime is 61523166871. The next prime is 61523166911. The reversal of 61523166909 is 90966132516.

It is a happy number.

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 61523166909 - 2²⁵ = 61489612477 is a prime.

It is a super-2 number, since 2×61523166909² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61523166979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45170514 + ... + 45171875.

It is an arithmetic number, because the mean of its divisors is an integer number (10299032460).

Almost surely, 2^61523166909 is an apocalyptic number.

It is an amenable number.

61523166909 is a deficient number, since it is larger than the sum of its proper divisors (20869092771).

61523166909 is a wasteful number, since it uses less digits than its factorization.

61523166909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90342619.

The product of its (nonzero) digits is 524880, while the sum is 48.

The spelling of 61523166909 in words is "sixty-one billion, five hundred twenty-three million, one hundred sixty-six thousand, nine hundred nine".