61722459 has 8 divisors (see below), whose sum is σ = 91440720. Its totient is φ = 41148288.

The previous prime is 61722443. The next prime is 61722487. The reversal of 61722459 is 95422716.

It is not a de Polignac number, because 61722459 - 2⁴ = 61722443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61722439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1142982 + ... + 1143035.

It is an arithmetic number, because the mean of its divisors is an integer number (11430090).

Almost surely, 2^61722459 is an apocalyptic number.

61722459 is a deficient number, since it is larger than the sum of its proper divisors (29718261).

61722459 is a wasteful number, since it uses less digits than its factorization.

61722459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286026 (or 2286020 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 61722459 is about 7856.3642354463. The cubic root of 61722459 is about 395.1976983965.

The spelling of 61722459 in words is "sixty-one million, seven hundred twenty-two thousand, four hundred fifty-nine".