61081949760 has 112 divisors (see below), whose sum is σ = 208853324736. Its totient is φ = 15035553792.

The previous prime is 61081949717. The next prime is 61081949767. The reversal of 61081949760 is 6794918016.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (61081949767) 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, 2434714 + ... + 2459673.

It is an arithmetic number, because the mean of its divisors is an integer number (1864761828).

Almost surely, 2^61081949760 is an apocalyptic number.

61081949760 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61081949760 is an abundant number, since it is smaller than the sum of its proper divisors (147771374976).

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

61081949760 is a wasteful number, since it uses less digits than its factorization.

61081949760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4894420 (or 4894410 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 51.

The spelling of 61081949760 in words is "sixty-one billion, eighty-one million, nine hundred forty-nine thousand, seven hundred sixty".