61044278160 has 80 divisors (see below), whose sum is σ = 190022659200. Its totient is φ = 16210913280.

The previous prime is 61044278159. The next prime is 61044278189. The reversal of 61044278160 is 6187244016.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 469860 + ... + 585539.

It is an arithmetic number, because the mean of its divisors is an integer number (2375283240).

Almost surely, 2^61044278160 is an apocalyptic number.

61044278160 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61044278160 is an abundant number, since it is smaller than the sum of its proper divisors (128978381040).

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

61044278160 is a wasteful number, since it uses less digits than its factorization.

61044278160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055656 (or 1055650 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 61044278160 in words is "sixty-one billion, forty-four million, two hundred seventy-eight thousand, one hundred sixty".