61878191662 has 48 divisors (see below), whose sum is σ = 108562200912. Its totient is φ = 26374360320.

The previous prime is 61878191621. The next prime is 61878191677. The reversal of 61878191662 is 26619187816.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26521848 + ... + 26524180.

It is an arithmetic number, because the mean of its divisors is an integer number (2261712519).

Almost surely, 2^61878191662 is an apocalyptic number.

61878191662 is a deficient number, since it is larger than the sum of its proper divisors (46684009250).

61878191662 is a wasteful number, since it uses less digits than its factorization.

61878191662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3713 (or 3706 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 55.

The spelling of 61878191662 in words is "sixty-one billion, eight hundred seventy-eight million, one hundred ninety-one thousand, six hundred sixty-two".