61367745663 has 32 divisors (see below), whose sum is σ = 104062387200. Its totient is φ = 35013511008.

The previous prime is 61367745643. The next prime is 61367745667. The reversal of 61367745663 is 36654776316.

It is a happy number.

61367745663 is a `hidden beast` number, since 6 + 1 + 3 + 6 + 7 + 74 + 566 + 3 = 666.

It is not a de Polignac number, because 61367745663 - 2⁶ = 61367745599 is a prime.

It is a super-3 number, since 3×61367745663³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61367745667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125203 + ... + 372036.

It is an arithmetic number, because the mean of its divisors is an integer number (3251949600).

Almost surely, 2^61367745663 is an apocalyptic number.

61367745663 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

61367745663 is a deficient number, since it is larger than the sum of its proper divisors (42694641537).

61367745663 is a wasteful number, since it uses less digits than its factorization.

61367745663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497908 (or 497902 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 54.

The spelling of 61367745663 in words is "sixty-one billion, three hundred sixty-seven million, seven hundred forty-five thousand, six hundred sixty-three".