61878130011 has 20 divisors (see below), whose sum is σ = 94179298752. Its totient is φ = 40473742608.

The previous prime is 61878129991. The next prime is 61878130033. The reversal of 61878130011 is 11003187816.

It is a happy number.

61878130011 is a `hidden beast` number, since 618 + 7 + 8 + 1 + 30 + 0 + 1 + 1 = 666.

It is not a de Polignac number, because 61878130011 - 2⁹ = 61878129499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61878130211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7202571 + ... + 7211156.

Almost surely, 2^61878130011 is an apocalyptic number.

61878130011 is a deficient number, since it is larger than the sum of its proper divisors (32301168741).

61878130011 is a wasteful number, since it uses less digits than its factorization.

61878130011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14413792 (or 14413783 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The spelling of 61878130011 in words is "sixty-one billion, eight hundred seventy-eight million, one hundred thirty thousand, eleven".