61263140756553 has 6 divisors (see below), whose sum is σ = 88491203315034. Its totient is φ = 40842093837696.

The previous prime is 61263140756501. The next prime is 61263140756617. The reversal of 61263140756553 is 35565704136216.

61263140756553 is a `hidden beast` number, since 6 + 1 + 2 + 6 + 3 + 14 + 0 + 75 + 6 + 553 = 666.

It can be written as a sum of positive squares in only one way, i.e., 60127183405584 + 1135957350969 = 7754172^2 + 1065813^2 .

It is not a de Polignac number, because 61263140756553 - 2¹⁷ = 61263140625481 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61263140756553.

It is not an unprimeable number, because it can be changed into a prime (61263140756353) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3403507819800 + ... + 3403507819817.

It is an arithmetic number, because the mean of its divisors is an integer number (14748533885839).

Almost surely, 2^{61263140756553} is an apocalyptic number.

It is an amenable number.

61263140756553 is a deficient number, since it is larger than the sum of its proper divisors (27228062558481).

61263140756553 is a wasteful number, since it uses less digits than its factorization.

61263140756553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6807015639623 (or 6807015639620 counting only the distinct ones).

The product of its (nonzero) digits is 13608000, while the sum is 54.

The spelling of 61263140756553 in words is "sixty-one trillion, two hundred sixty-three billion, one hundred forty million, seven hundred fifty-six thousand, five hundred fifty-three".