61878105030 has 96 divisors (see below), whose sum is σ = 181845941760. Its totient is φ = 13399162560.

The previous prime is 61878104989. The next prime is 61878105041. The reversal of 61878105030 is 3050187816.

It is a super-2 number, since 2×61878105030² (a number of 22 digits) contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 61878105030.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1079806 + ... + 1135665.

It is an arithmetic number, because the mean of its divisors is an integer number (1894228560).

Almost surely, 2^61878105030 is an apocalyptic number.

61878105030 is an abundant number, since it is smaller than the sum of its proper divisors (119967836730).

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

61878105030 is a wasteful number, since it uses less digits than its factorization.

61878105030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215514 (or 2215507 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 39.

The spelling of 61878105030 in words is "sixty-one billion, eight hundred seventy-eight million, one hundred five thousand, thirty".