61153518361663 has 32 divisors (see below), whose sum is σ = 75583103404032. Its totient is φ = 48181489977600.

The previous prime is 61153518361657. The next prime is 61153518361667. The reversal of 61153518361663 is 36616381535116.

It is not a de Polignac number, because 61153518361663 - 2⁹ = 61153518361151 is a prime.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61153518361667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38368170 + ... + 39930232.

It is an arithmetic number, because the mean of its divisors is an integer number (2361971981376).

Almost surely, 2^{61153518361663} is an apocalyptic number.

61153518361663 is a deficient number, since it is larger than the sum of its proper divisors (14429585042369).

61153518361663 is a wasteful number, since it uses less digits than its factorization.

61153518361663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563895.

The product of its digits is 6998400, while the sum is 55.

Adding to 61153518361663 its reverse (36616381535116), we get a palindrome (97769899896779).

The spelling of 61153518361663 in words is "sixty-one trillion, one hundred fifty-three billion, five hundred eighteen million, three hundred sixty-one thousand, six hundred sixty-three".