61063591545 has 48 divisors (see below), whose sum is σ = 116927366400. Its totient is φ = 29231804160.

The previous prime is 61063591513. The next prime is 61063591559. The reversal of 61063591545 is 54519536016.

61063591545 is a `hidden beast` number, since 6 + 1 + 0 + 6 + 3 + 591 + 54 + 5 = 666.

It is not a de Polignac number, because 61063591545 - 2⁵ = 61063591513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 61063591545.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 741660 + ... + 819869.

It is an arithmetic number, because the mean of its divisors is an integer number (2435986800).

Almost surely, 2^61063591545 is an apocalyptic number.

It is an amenable number.

61063591545 is a deficient number, since it is larger than the sum of its proper divisors (55863774855).

61063591545 is a wasteful number, since it uses less digits than its factorization.

61063591545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561630 (or 1561627 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 45.

The spelling of 61063591545 in words is "sixty-one billion, sixty-three million, five hundred ninety-one thousand, five hundred forty-five".