155949186749 has 16 divisors (see below), whose sum is σ = 158879863296. Its totient is φ = 153040330800.

The previous prime is 155949186719. The next prime is 155949186761. The reversal of 155949186749 is 947681949551.

It is a cyclic number.

It is not a de Polignac number, because 155949186749 - 2³⁶ = 87229710013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155949186719) 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 15 ways as a sum of consecutive naturals, for example, 17149694 + ... + 17158784.

It is an arithmetic number, because the mean of its divisors is an integer number (9929991456).

Almost surely, 2^155949186749 is an apocalyptic number.

It is an amenable number.

155949186749 is a deficient number, since it is larger than the sum of its proper divisors (2930676547).

155949186749 is an equidigital number, since it uses as much as digits as its factorization.

155949186749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10256.

The product of its digits is 97977600, while the sum is 68.

The spelling of 155949186749 in words is "one hundred fifty-five billion, nine hundred forty-nine million, one hundred eighty-six thousand, seven hundred forty-nine".