153030393981 has 24 divisors (see below), whose sum is σ = 224102619000. Its totient is φ = 100614446592.

The previous prime is 153030393949. The next prime is 153030393983. The reversal of 153030393981 is 189393030351.

153030393981 is a `hidden beast` number, since 1 + 530 + 3 + 0 + 3 + 9 + 39 + 81 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 10706040900 + 142324353081 = 103470^2 + 377259^2 .

It is not a de Polignac number, because 153030393981 - 2⁵ = 153030393949 is a prime.

It is a super-2 number, since 2×153030393981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153030393983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66025 + ... + 557153.

It is an arithmetic number, because the mean of its divisors is an integer number (9337609125).

Almost surely, 2^153030393981 is an apocalyptic number.

It is an amenable number.

153030393981 is a deficient number, since it is larger than the sum of its proper divisors (71072225019).

153030393981 is a wasteful number, since it uses less digits than its factorization.

153030393981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491613 (or 491610 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The spelling of 153030393981 in words is "one hundred fifty-three billion, thirty million, three hundred ninety-three thousand, nine hundred eighty-one".