1081639156 has 24 divisors (see below), whose sum is σ = 2068905440. Its totient is φ = 491765472.

The previous prime is 1081639133. The next prime is 1081639159. The reversal of 1081639156 is 6519361801.

It is a super-3 number, since 3×1081639156³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081639159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151746 + ... + 158713.

Almost surely, 2^1081639156 is an apocalyptic number.

It is an amenable number.

1081639156 is a deficient number, since it is larger than the sum of its proper divisors (987266284).

1081639156 is a wasteful number, since it uses less digits than its factorization.

1081639156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310543 (or 310541 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 1081639156 is about 32888.2829591330. The cubic root of 1081639156 is about 1026.5043643943.

The spelling of 1081639156 in words is "one billion, eighty-one million, six hundred thirty-nine thousand, one hundred fifty-six".