61266783390 has 64 divisors (see below), whose sum is σ = 150669953280. Its totient is φ = 15934741760.

The previous prime is 61266783379. The next prime is 61266783421. The reversal of 61266783390 is 9338766216.

It is a Curzon number.

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 31 ways as a sum of consecutive naturals, for example, 7300777 + ... + 7309163.

It is an arithmetic number, because the mean of its divisors is an integer number (2354218020).

Almost surely, 2^61266783390 is an apocalyptic number.

61266783390 is an abundant number, since it is smaller than the sum of its proper divisors (89403169890).

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

61266783390 is a wasteful number, since it uses less digits than its factorization.

61266783390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14377.

The product of its (nonzero) digits is 1959552, while the sum is 51.

The spelling of 61266783390 in words is "sixty-one billion, two hundred sixty-six million, seven hundred eighty-three thousand, three hundred ninety".