61278889574 has 16 divisors (see below), whose sum is σ = 105052992768. Its totient is φ = 26261514312.

The previous prime is 61278889559. The next prime is 61278889603. The reversal of 61278889574 is 47598887216.

It is a self number, because there is not a number n which added to its sum of digits gives 61278889574.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554489 + ... + 655755.

It is an arithmetic number, because the mean of its divisors is an integer number (6565812048).

Almost surely, 2^61278889574 is an apocalyptic number.

61278889574 is a deficient number, since it is larger than the sum of its proper divisors (43774103194).

61278889574 is a wasteful number, since it uses less digits than its factorization.

61278889574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144499.

The product of its digits is 54190080, while the sum is 65.

The spelling of 61278889574 in words is "sixty-one billion, two hundred seventy-eight million, eight hundred eighty-nine thousand, five hundred seventy-four".