155951190655397 has 4 divisors (see below), whose sum is σ = 158594431175040. Its totient is φ = 153307950135756.

The previous prime is 155951190655387. The next prime is 155951190655453. The reversal of 155951190655397 is 793556091159551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 155951190655397 - 2³⁰ = 155950116913573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155951190655397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155951190655327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1321620259733 + ... + 1321620259850.

It is an arithmetic number, because the mean of its divisors is an integer number (39648607793760).

Almost surely, 2^{155951190655397} is an apocalyptic number.

It is an amenable number.

155951190655397 is a deficient number, since it is larger than the sum of its proper divisors (2643240519643).

155951190655397 is an equidigital number, since it uses as much as digits as its factorization.

155951190655397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2643240519642.

The product of its (nonzero) digits is 287043750, while the sum is 71.

The spelling of 155951190655397 in words is "one hundred fifty-five trillion, nine hundred fifty-one billion, one hundred ninety million, six hundred fifty-five thousand, three hundred ninety-seven".