61022446491 has 4 divisors (see below), whose sum is σ = 81363261992. Its totient is φ = 40681630992.

The previous prime is 61022446451. The next prime is 61022446501. The reversal of 61022446491 is 19464422016.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61022446491 - 2²¹ = 61020349339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61022446421) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10170407746 + ... + 10170407751.

It is an arithmetic number, because the mean of its divisors is an integer number (20340815498).

Almost surely, 2^61022446491 is an apocalyptic number.

61022446491 is a deficient number, since it is larger than the sum of its proper divisors (20340815501).

61022446491 is a wasteful number, since it uses less digits than its factorization.

61022446491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20340815500.

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 61022446491 in words is "sixty-one billion, twenty-two million, four hundred forty-six thousand, four hundred ninety-one".