153949877981 has 16 divisors (see below), whose sum is σ = 161167272000. Its totient is φ = 146919339648.

The previous prime is 153949877957. The next prime is 153949877989. The reversal of 153949877981 is 189778949351.

153949877981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-153949877981 is a prime.

It is a super-2 number, since 2×153949877981² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153949877989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246545 + ... + 607193.

It is an arithmetic number, because the mean of its divisors is an integer number (10072954500).

Almost surely, 2^153949877981 is an apocalyptic number.

It is an amenable number.

153949877981 is a deficient number, since it is larger than the sum of its proper divisors (7217394019).

153949877981 is a wasteful number, since it uses less digits than its factorization.

153949877981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360908.

The product of its digits is 137168640, while the sum is 71.

The spelling of 153949877981 in words is "one hundred fifty-three billion, nine hundred forty-nine million, eight hundred seventy-seven thousand, nine hundred eighty-one".