154699226261 has 2 divisors, whose sum is σ = 154699226262. Its totient is φ = 154699226260.

The previous prime is 154699226257. The next prime is 154699226281. The reversal of 154699226261 is 162622996451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90236555236 + 64462671025 = 300394^2 + 253895^2 .

It is an emirp because it is prime and its reverse (162622996451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154699226261 - 2² = 154699226257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154699226281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77349613130 + 77349613131.

It is an arithmetic number, because the mean of its divisors is an integer number (77349613131).

Almost surely, 2^154699226261 is an apocalyptic number.

It is an amenable number.

154699226261 is a deficient number, since it is larger than the sum of its proper divisors (1).

154699226261 is an equidigital number, since it uses as much as digits as its factorization.

154699226261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 53.

The spelling of 154699226261 in words is "one hundred fifty-four billion, six hundred ninety-nine million, two hundred twenty-six thousand, two hundred sixty-one".