61884919491 has 8 divisors (see below), whose sum is σ = 82557146880. Its totient is φ = 41234652552.

The previous prime is 61884919463. The next prime is 61884919501. The reversal of 61884919491 is 19491948816.

61884919491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61884919491 - 2¹¹ = 61884917443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61884919891) 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, 5483535 + ... + 5494808.

It is an arithmetic number, because the mean of its divisors is an integer number (10319643360).

Almost surely, 2^61884919491 is an apocalyptic number.

61884919491 is a deficient number, since it is larger than the sum of its proper divisors (20672227389).

61884919491 is a wasteful number, since it uses less digits than its factorization.

61884919491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10980225.

The product of its digits is 4478976, while the sum is 60.

The spelling of 61884919491 in words is "sixty-one billion, eight hundred eighty-four million, nine hundred nineteen thousand, four hundred ninety-one".