136197978764427 has 24 divisors (see below), whose sum is σ = 199430351796000. Its totient is φ = 89552589648768.

The previous prime is 136197978764399. The next prime is 136197978764459. The reversal of 136197978764427 is 724467879791631.

136197978764427 is a `hidden beast` number, since 1 + 3 + 6 + 1 + 9 + 7 + 97 + 87 + 6 + 442 + 7 = 666.

It is not a de Polignac number, because 136197978764427 - 2¹² = 136197978760331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136197978764027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23825074 + ... + 28983272.

It is an arithmetic number, because the mean of its divisors is an integer number (8309597991500).

Almost surely, 2^{136197978764427} is an apocalyptic number.

136197978764427 is a deficient number, since it is larger than the sum of its proper divisors (63232373031573).

136197978764427 is a wasteful number, since it uses less digits than its factorization.

136197978764427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5198467 (or 5198464 counting only the distinct ones).

The product of its digits is 5377010688, while the sum is 81.

The spelling of 136197978764427 in words is "one hundred thirty-six trillion, one hundred ninety-seven billion, nine hundred seventy-eight million, seven hundred sixty-four thousand, four hundred twenty-seven".