61553165612645 has 32 divisors (see below), whose sum is σ = 84537352499712. Its totient is φ = 42147102511872.

The previous prime is 61553165612629. The next prime is 61553165612647. The reversal of 61553165612645 is 54621656135516.

It is a cyclic number.

It is not a de Polignac number, because 61553165612645 - 2⁴ = 61553165612629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61553165612647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 366602984 + ... + 366770846.

It is an arithmetic number, because the mean of its divisors is an integer number (2641792265616).

Almost surely, 2^{61553165612645} is an apocalyptic number.

It is an amenable number.

61553165612645 is a deficient number, since it is larger than the sum of its proper divisors (22984186887067).

61553165612645 is a wasteful number, since it uses less digits than its factorization.

61553165612645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182901.

The product of its digits is 19440000, while the sum is 56.

The spelling of 61553165612645 in words is "sixty-one trillion, five hundred fifty-three billion, one hundred sixty-five million, six hundred twelve thousand, six hundred forty-five".