61005545510540 has 24 divisors (see below), whose sum is σ = 135647624724192. Its totient is φ = 22966793603840.

The previous prime is 61005545510537. The next prime is 61005545510543. The reversal of 61005545510540 is 4501554550016.

It is an interprime number because it is at equal distance from previous prime (61005545510537) and next prime (61005545510543).

It is not an unprimeable number, because it can be changed into a prime (61005545510543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89714037176 + ... + 89714037855.

It is an arithmetic number, because the mean of its divisors is an integer number (5651984363508).

Almost surely, 2^{61005545510540} is an apocalyptic number.

It is an amenable number.

61005545510540 is an abundant number, since it is smaller than the sum of its proper divisors (74642079213652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61005545510540 is a wasteful number, since it uses less digits than its factorization.

61005545510540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179428075057 (or 179428075055 counting only the distinct ones).

The product of its (nonzero) digits is 300000, while the sum is 41.

The spelling of 61005545510540 in words is "sixty-one trillion, five billion, five hundred forty-five million, five hundred ten thousand, five hundred forty".