61167881019 has 16 divisors (see below), whose sum is σ = 95191354368. Its totient is φ = 34209391872.

The previous prime is 61167881011. The next prime is 61167881057. The reversal of 61167881019 is 91018876116.

It is not a de Polignac number, because 61167881019 - 2³ = 61167881011 is a prime.

It is a super-2 number, since 2×61167881019² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61167881011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30985782 + ... + 30987755.

It is an arithmetic number, because the mean of its divisors is an integer number (5949459648).

Almost surely, 2^61167881019 is an apocalyptic number.

61167881019 is a deficient number, since it is larger than the sum of its proper divisors (34023473349).

61167881019 is a wasteful number, since it uses less digits than its factorization.

61167881019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61973594.

The product of its (nonzero) digits is 145152, while the sum is 48.

The spelling of 61167881019 in words is "sixty-one billion, one hundred sixty-seven million, eight hundred eighty-one thousand, nineteen".