155516797 has 2 divisors, whose sum is σ = 155516798. Its totient is φ = 155516796.

The previous prime is 155516761. The next prime is 155516807. The reversal of 155516797 is 797615551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147598201 + 7918596 = 12149^2 + 2814^2 .

It is a cyclic number.

It is not a de Polignac number, because 155516797 - 2¹⁵ = 155484029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155516717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77758398 + 77758399.

It is an arithmetic number, because the mean of its divisors is an integer number (77758399).

Almost surely, 2^155516797 is an apocalyptic number.

It is an amenable number.

155516797 is a deficient number, since it is larger than the sum of its proper divisors (1).

155516797 is an equidigital number, since it uses as much as digits as its factorization.

155516797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 330750, while the sum is 46.

The square root of 155516797 is about 12470.6373934936. The cubic root of 155516797 is about 537.7648777047.

The spelling of 155516797 in words is "one hundred fifty-five million, five hundred sixteen thousand, seven hundred ninety-seven".