61506601571010 has 128 divisors (see below), whose sum is σ = 158994620064000. Its totient is φ = 15170882232320.

The previous prime is 61506601570987. The next prime is 61506601571017. The reversal of 61506601571010 is 1017510660516.

It is a self number, because there is not a number n which added to its sum of digits gives 61506601571010.

It is not an unprimeable number, because it can be changed into a prime (61506601571017) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 103484080 + ... + 104076740.

It is an arithmetic number, because the mean of its divisors is an integer number (1242145469250).

Almost surely, 2^{61506601571010} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61506601571010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79497310032000).

61506601571010 is an abundant number, since it is smaller than the sum of its proper divisors (97488018492990).

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

61506601571010 is a wasteful number, since it uses less digits than its factorization.

61506601571010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596196.

The product of its (nonzero) digits is 37800, while the sum is 39.

The spelling of 61506601571010 in words is "sixty-one trillion, five hundred six billion, six hundred one million, five hundred seventy-one thousand, ten".