61879527394 has 4 divisors (see below), whose sum is σ = 92819291094. Its totient is φ = 30939763696.

The previous prime is 61879527379. The next prime is 61879527467. The reversal of 61879527394 is 49372597816.

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

It can be written as a sum of positive squares in only one way, i.e., 59664413169 + 2215114225 = 244263^2 + 47065^2 .

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 as a sum of consecutive naturals, namely, 15469881847 + ... + 15469881850.

Almost surely, 2^61879527394 is an apocalyptic number.

61879527394 is a deficient number, since it is larger than the sum of its proper divisors (30939763700).

61879527394 is a wasteful number, since it uses less digits than its factorization.

61879527394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30939763699.

The product of its digits is 22861440, while the sum is 61.

The spelling of 61879527394 in words is "sixty-one billion, eight hundred seventy-nine million, five hundred twenty-seven thousand, three hundred ninety-four".