156541153861 has 2 divisors, whose sum is σ = 156541153862. Its totient is φ = 156541153860.

The previous prime is 156541153859. The next prime is 156541153883. The reversal of 156541153861 is 168351145651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125677340100 + 30863813761 = 354510^2 + 175681^2 .

It is a cyclic number.

It is not a de Polignac number, because 156541153861 - 2¹ = 156541153859 is a prime.

Together with 156541153859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156541153831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78270576930 + 78270576931.

It is an arithmetic number, because the mean of its divisors is an integer number (78270576931).

Almost surely, 2^156541153861 is an apocalyptic number.

It is an amenable number.

156541153861 is a deficient number, since it is larger than the sum of its proper divisors (1).

156541153861 is an equidigital number, since it uses as much as digits as its factorization.

156541153861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432000, while the sum is 46.

The spelling of 156541153861 in words is "one hundred fifty-six billion, five hundred forty-one million, one hundred fifty-three thousand, eight hundred sixty-one".