61680249268 has 24 divisors (see below), whose sum is σ = 120935725344. Its totient is φ = 27278733600.

The previous prime is 61680249251. The next prime is 61680249307. The reversal of 61680249268 is 86294208616.

It is a super-2 number, since 2×61680249268² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 18941938 + ... + 18945193.

It is an arithmetic number, because the mean of its divisors is an integer number (5038988556).

Almost surely, 2^61680249268 is an apocalyptic number.

It is an amenable number.

61680249268 is a deficient number, since it is larger than the sum of its proper divisors (59255476076).

61680249268 is a wasteful number, since it uses less digits than its factorization.

61680249268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37887183 (or 37887181 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 52.

The spelling of 61680249268 in words is "sixty-one billion, six hundred eighty million, two hundred forty-nine thousand, two hundred sixty-eight".