156106171649947 has 2 divisors, whose sum is σ = 156106171649948. Its totient is φ = 156106171649946.

The previous prime is 156106171649933. The next prime is 156106171650029. The reversal of 156106171649947 is 749946171601651.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156106171649947 is a prime.

It is not a weakly prime, because it can be changed into another prime (156106171649047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78053085824973 + 78053085824974.

It is an arithmetic number, because the mean of its divisors is an integer number (78053085824974).

Almost surely, 2^{156106171649947} is an apocalyptic number.

156106171649947 is a deficient number, since it is larger than the sum of its proper divisors (1).

156106171649947 is an equidigital number, since it uses as much as digits as its factorization.

156106171649947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68584320, while the sum is 67.

The spelling of 156106171649947 in words is "one hundred fifty-six trillion, one hundred six billion, one hundred seventy-one million, six hundred forty-nine thousand, nine hundred forty-seven".