155032664349491 has 2 divisors, whose sum is σ = 155032664349492. Its totient is φ = 155032664349490.

The previous prime is 155032664349487. The next prime is 155032664349529. The reversal of 155032664349491 is 194943466230551.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155032664349491 - 2² = 155032664349487 is a prime.

It is a super-3 number, since 3×155032664349491³ (a number of 44 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (155032664346491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77516332174745 + 77516332174746.

It is an arithmetic number, because the mean of its divisors is an integer number (77516332174746).

Almost surely, 2^{155032664349491} is an apocalyptic number.

155032664349491 is a deficient number, since it is larger than the sum of its proper divisors (1).

155032664349491 is an equidigital number, since it uses as much as digits as its factorization.

155032664349491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 83980800, while the sum is 62.

The spelling of 155032664349491 in words is "one hundred fifty-five trillion, thirty-two billion, six hundred sixty-four million, three hundred forty-nine thousand, four hundred ninety-one".