61445014625563 has 4 divisors (see below), whose sum is σ = 62486455551480. Its totient is φ = 60403573699648.

The previous prime is 61445014625549. The next prime is 61445014625569. The reversal of 61445014625563 is 36552641054416.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61445014625563 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61445014625563.

It is not an unprimeable number, because it can be changed into a prime (61445014625569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520720462870 + ... + 520720462987.

It is an arithmetic number, because the mean of its divisors is an integer number (15621613887870).

Almost surely, 2^{61445014625563} is an apocalyptic number.

61445014625563 is a deficient number, since it is larger than the sum of its proper divisors (1041440925917).

61445014625563 is a wasteful number, since it uses less digits than its factorization.

61445014625563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041440925916.

The product of its (nonzero) digits is 10368000, while the sum is 52.

Adding to 61445014625563 its reverse (36552641054416), we get a palindrome (97997655679979).

The spelling of 61445014625563 in words is "sixty-one trillion, four hundred forty-five billion, fourteen million, six hundred twenty-five thousand, five hundred sixty-three".