61353680553 has 64 divisors (see below), whose sum is σ = 105079161600. Its totient is φ = 35025984000.

The previous prime is 61353680551. The next prime is 61353680581. The reversal of 61353680553 is 35508635316.

It is a happy number.

61353680553 is a `hidden beast` number, since 6 + 1 + 35 + 3 + 68 + 0 + 553 = 666.

It is not a de Polignac number, because 61353680553 - 2¹ = 61353680551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61353680499 and 61353680508.

It is not an unprimeable number, because it can be changed into a prime (61353680551) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 266263 + ... + 440003.

It is an arithmetic number, because the mean of its divisors is an integer number (1641861900).

Almost surely, 2^61353680553 is an apocalyptic number.

It is an amenable number.

61353680553 is a deficient number, since it is larger than the sum of its proper divisors (43725481047).

61353680553 is a wasteful number, since it uses less digits than its factorization.

61353680553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173831 (or 173825 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 45.

The spelling of 61353680553 in words is "sixty-one billion, three hundred fifty-three million, six hundred eighty thousand, five hundred fifty-three".