61355008375770 has 32 divisors (see below), whose sum is σ = 147900707431488. Its totient is φ = 16289259196928.

The previous prime is 61355008375729. The next prime is 61355008375777. The reversal of 61355008375770 is 7757380055316.

It is a self number, because there is not a number n which added to its sum of digits gives 61355008375770.

It is not an unprimeable number, because it can be changed into a prime (61355008375777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4504766199 + ... + 4504779818.

It is an arithmetic number, because the mean of its divisors is an integer number (4621897107234).

Almost surely, 2^{61355008375770} is an apocalyptic number.

61355008375770 is an abundant number, since it is smaller than the sum of its proper divisors (86545699055718).

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

61355008375770 is a wasteful number, since it uses less digits than its factorization.

61355008375770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9009546254.

The product of its (nonzero) digits is 18522000, while the sum is 57.

The spelling of 61355008375770 in words is "sixty-one trillion, three hundred fifty-five billion, eight million, three hundred seventy-five thousand, seven hundred seventy".