981481156 has 6 divisors (see below), whose sum is σ = 1717592030. Its totient is φ = 490740576.

The previous prime is 981481153. The next prime is 981481169. The reversal of 981481156 is 651184189.

It can be written as a sum of positive squares in only one way, i.e., 980942400 + 538756 = 31320^2 + 734^2 .

It is not an unprimeable number, because it can be changed into a prime (981481153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122685141 + ... + 122685148.

Almost surely, 2^981481156 is an apocalyptic number.

It is an amenable number.

981481156 is a deficient number, since it is larger than the sum of its proper divisors (736110874).

981481156 is a wasteful number, since it uses less digits than its factorization.

981481156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245370293 (or 245370291 counting only the distinct ones).

The product of its digits is 69120, while the sum is 43.

The square root of 981481156 is about 31328.5996495215. The cubic root of 981481156 is about 993.7885497697.

The spelling of 981481156 in words is "nine hundred eighty-one million, four hundred eighty-one thousand, one hundred fifty-six".