61448071878 has 16 divisors (see below), whose sum is σ = 136551270960. Its totient is φ = 20482690608.

The previous prime is 61448071873. The next prime is 61448071889. The reversal of 61448071878 is 87817084416.

61448071878 is a `hidden beast` number, since 6 + 14 + 480 + 71 + 87 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1137927257 = 61448071878 / (6 + 1 + 4 + 4 + 8 + 0 + 7 + 1 + 8 + 7 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61448071873) 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 7 ways as a sum of consecutive naturals, for example, 568963575 + ... + 568963682.

It is an arithmetic number, because the mean of its divisors is an integer number (8534454435).

Almost surely, 2^61448071878 is an apocalyptic number.

61448071878 is an abundant number, since it is smaller than the sum of its proper divisors (75103199082).

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

61448071878 is a wasteful number, since it uses less digits than its factorization.

61448071878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137927268 (or 1137927262 counting only the distinct ones).

The product of its (nonzero) digits is 2408448, while the sum is 54.

The spelling of 61448071878 in words is "sixty-one billion, four hundred forty-eight million, seventy-one thousand, eight hundred seventy-eight".