155005968731 has 8 divisors (see below), whose sum is σ = 157665908400. Its totient is φ = 152347119840.

The previous prime is 155005968727. The next prime is 155005968749. The reversal of 155005968731 is 137869500551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155005968731 - 2² = 155005968727 is a prime.

It is a super-2 number, since 2×155005968731² (a number of 23 digits) contains 22 as substring.

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 155005968731.

It is not an unprimeable number, because it can be changed into a prime (155005968721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16565 + ... + 557033.

It is an arithmetic number, because the mean of its divisors is an integer number (19708238550).

Almost surely, 2^155005968731 is an apocalyptic number.

155005968731 is a deficient number, since it is larger than the sum of its proper divisors (2659939669).

155005968731 is an equidigital number, since it uses as much as digits as its factorization.

155005968731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545389.

The product of its (nonzero) digits is 1134000, while the sum is 50.

The spelling of 155005968731 in words is "one hundred fifty-five billion, five million, nine hundred sixty-eight thousand, seven hundred thirty-one".