61028458878 has 32 divisors (see below), whose sum is σ = 123790070016. Its totient is φ = 20054236608.

The previous prime is 61028458847. The next prime is 61028458891. The reversal of 61028458878 is 87885482016.

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 15 ways as a sum of consecutive naturals, for example, 880725 + ... + 947487.

It is an arithmetic number, because the mean of its divisors is an integer number (3868439688).

Almost surely, 2^61028458878 is an apocalyptic number.

61028458878 is an abundant number, since it is smaller than the sum of its proper divisors (62761611138).

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

61028458878 is a wasteful number, since it uses less digits than its factorization.

61028458878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68928.

The product of its (nonzero) digits is 6881280, while the sum is 57.

The spelling of 61028458878 in words is "sixty-one billion, twenty-eight million, four hundred fifty-eight thousand, eight hundred seventy-eight".