154195722997 has 2 divisors, whose sum is σ = 154195722998. Its totient is φ = 154195722996.

The previous prime is 154195722937. The next prime is 154195723039. The reversal of 154195722997 is 799227591451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154192870276 + 2852721 = 392674^2 + 1689^2 .

It is a cyclic number.

It is not a de Polignac number, because 154195722997 - 2³¹ = 152048239349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154195722937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77097861498 + 77097861499.

It is an arithmetic number, because the mean of its divisors is an integer number (77097861499).

Almost surely, 2^154195722997 is an apocalyptic number.

It is an amenable number.

154195722997 is a deficient number, since it is larger than the sum of its proper divisors (1).

154195722997 is an equidigital number, since it uses as much as digits as its factorization.

154195722997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14288400, while the sum is 61.

The spelling of 154195722997 in words is "one hundred fifty-four billion, one hundred ninety-five million, seven hundred twenty-two thousand, nine hundred ninety-seven".