155951190655493 has 2 divisors, whose sum is σ = 155951190655494. Its totient is φ = 155951190655492.

The previous prime is 155951190655453. The next prime is 155951190655529. The reversal of 155951190655493 is 394556091159551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147918087216964 + 8033103438529 = 12162158^2 + 2834273^2 .

It is a cyclic number.

It is not a de Polignac number, because 155951190655493 - 2¹² = 155951190651397 is a prime.

It is a super-2 number, since 2×155951190655493² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155951190655453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77975595327746 + 77975595327747.

It is an arithmetic number, because the mean of its divisors is an integer number (77975595327747).

Almost surely, 2^{155951190655493} is an apocalyptic number.

It is an amenable number.

155951190655493 is a deficient number, since it is larger than the sum of its proper divisors (1).

155951190655493 is an equidigital number, since it uses as much as digits as its factorization.

155951190655493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 164025000, while the sum is 68.

The spelling of 155951190655493 in words is "one hundred fifty-five trillion, nine hundred fifty-one billion, one hundred ninety million, six hundred fifty-five thousand, four hundred ninety-three".