155543492157197 has 2 divisors, whose sum is σ = 155543492157198. Its totient is φ = 155543492157196.

The previous prime is 155543492157103. The next prime is 155543492157253. The reversal of 155543492157197 is 791751294345551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146998504998436 + 8544987158761 = 12124294^2 + 2923181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155543492157197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155543492153197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77771746078598 + 77771746078599.

It is an arithmetic number, because the mean of its divisors is an integer number (77771746078599).

Almost surely, 2^{155543492157197} is an apocalyptic number.

It is an amenable number.

155543492157197 is a deficient number, since it is larger than the sum of its proper divisors (1).

155543492157197 is an equidigital number, since it uses as much as digits as its factorization.

155543492157197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 238140000, while the sum is 68.

The spelling of 155543492157197 in words is "one hundred fifty-five trillion, five hundred forty-three billion, four hundred ninety-two million, one hundred fifty-seven thousand, one hundred ninety-seven".