61684599455 has 16 divisors (see below), whose sum is σ = 74660572800. Its totient is φ = 48922392480.

The previous prime is 61684599439. The next prime is 61684599499. The reversal of 61684599455 is 55499548616.

It is not a de Polignac number, because 61684599455 - 2⁴ = 61684599439 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 621236 + ... + 713654.

It is an arithmetic number, because the mean of its divisors is an integer number (4666285800).

Almost surely, 2^61684599455 is an apocalyptic number.

61684599455 is a deficient number, since it is larger than the sum of its proper divisors (12975973345).

61684599455 is a wasteful number, since it uses less digits than its factorization.

61684599455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93574.

The product of its digits is 46656000, while the sum is 62.

The spelling of 61684599455 in words is "sixty-one billion, six hundred eighty-four million, five hundred ninety-nine thousand, four hundred fifty-five".