61489366590 has 32 divisors (see below), whose sum is σ = 147595750560. Its totient is φ = 16394801024.

The previous prime is 61489366577. The next prime is 61489366619. The reversal of 61489366590 is 9566398416.

It is a self number, because there is not a number n which added to its sum of digits gives 61489366590.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69112 + ... + 357428.

It is an arithmetic number, because the mean of its divisors is an integer number (4612367205).

Almost surely, 2^61489366590 is an apocalyptic number.

61489366590 is an abundant number, since it is smaller than the sum of its proper divisors (86106383970).

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

61489366590 is a wasteful number, since it uses less digits than its factorization.

61489366590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295436.

The product of its (nonzero) digits is 8398080, while the sum is 57.

The spelling of 61489366590 in words is "sixty-one billion, four hundred eighty-nine million, three hundred sixty-six thousand, five hundred ninety".