61636130465 has 32 divisors (see below), whose sum is σ = 91102669056. Its totient is φ = 38983276800.

The previous prime is 61636130453. The next prime is 61636130467. The reversal of 61636130465 is 56403163616.

It is not a de Polignac number, because 61636130465 - 2⁴ = 61636130449 is a prime.

It is a super-2 number, since 2×61636130465² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61636130467) 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 31 ways as a sum of consecutive naturals, for example, 539894 + ... + 644016.

It is an arithmetic number, because the mean of its divisors is an integer number (2846958408).

Almost surely, 2^61636130465 is an apocalyptic number.

61636130465 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61636130465 is a deficient number, since it is larger than the sum of its proper divisors (29466538591).

61636130465 is a wasteful number, since it uses less digits than its factorization.

61636130465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105449.

The product of its (nonzero) digits is 233280, while the sum is 41.

The spelling of 61636130465 in words is "sixty-one billion, six hundred thirty-six million, one hundred thirty thousand, four hundred sixty-five".