61685691276 has 24 divisors (see below), whose sum is σ = 157018123584. Its totient is φ = 18692633680.

The previous prime is 61685691203. The next prime is 61685691281. The reversal of 61685691276 is 67219658616.

61685691276 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233657790 + ... + 233658053.

It is an arithmetic number, because the mean of its divisors is an integer number (6542421816).

Almost surely, 2^61685691276 is an apocalyptic number.

61685691276 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

61685691276 is an abundant number, since it is smaller than the sum of its proper divisors (95332432308).

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

61685691276 is a wasteful number, since it uses less digits than its factorization.

61685691276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467315861 (or 467315859 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 57.

The spelling of 61685691276 in words is "sixty-one billion, six hundred eighty-five million, six hundred ninety-one thousand, two hundred seventy-six".