61061591892 has 96 divisors (see below), whose sum is σ = 164297548800. Its totient is φ = 17289487872.

The previous prime is 61061591887. The next prime is 61061591911. The reversal of 61061591892 is 29819516016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6919459 + ... + 6928277.

It is an arithmetic number, because the mean of its divisors is an integer number (1711432800).

Almost surely, 2^61061591892 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61061591892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82148774400).

61061591892 is an abundant number, since it is smaller than the sum of its proper divisors (103235956908).

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

61061591892 is a wasteful number, since it uses less digits than its factorization.

61061591892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9565 (or 9563 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 48.

The spelling of 61061591892 in words is "sixty-one billion, sixty-one million, five hundred ninety-one thousand, eight hundred ninety-two".