61178193988 has 12 divisors (see below), whose sum is σ = 107832069520. Its totient is φ = 30369031272.

The previous prime is 61178193983. The next prime is 61178194019. The reversal of 61178193988 is 88939187116.

It is not an unprimeable number, because it can be changed into a prime (61178193983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55015806 + ... + 55016917.

Almost surely, 2^61178193988 is an apocalyptic number.

It is an amenable number.

61178193988 is a deficient number, since it is larger than the sum of its proper divisors (46653875532).

61178193988 is a wasteful number, since it uses less digits than its factorization.

61178193988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110032866 (or 110032864 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 61.

The spelling of 61178193988 in words is "sixty-one billion, one hundred seventy-eight million, one hundred ninety-three thousand, nine hundred eighty-eight".