155781146513 has 32 divisors (see below), whose sum is σ = 164204789760. Its totient is φ = 147663996480.

The previous prime is 155781146503. The next prime is 155781146531. The reversal of 155781146513 is 315641187551.

It is a cyclic number.

It is not a de Polignac number, because 155781146513 - 2⁶ = 155781146449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155781146503) 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 31 ways as a sum of consecutive naturals, for example, 65425583 + ... + 65427963.

It is an arithmetic number, because the mean of its divisors is an integer number (5131399680).

Almost surely, 2^155781146513 is an apocalyptic number.

It is an amenable number.

155781146513 is a deficient number, since it is larger than the sum of its proper divisors (8423643247).

155781146513 is a wasteful number, since it uses less digits than its factorization.

155781146513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837.

The product of its digits is 504000, while the sum is 47.

The spelling of 155781146513 in words is "one hundred fifty-five billion, seven hundred eighty-one million, one hundred forty-six thousand, five hundred thirteen".