1081379531236 has 9 divisors (see below), whose sum is σ = 1892417819299. Its totient is φ = 540688725724.

The previous prime is 1081379531231. The next prime is 1081379531311. The reversal of 1081379531236 is 6321359731801.

The square root of 1081379531236 is 1039894.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1081379531236.

It is not an unprimeable number, because it can be changed into a prime (1081379531231) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1819815 + ... + 2339761.

Almost surely, 2^{1081379531236} is an apocalyptic number.

1081379531236 is the 1039894-th square number.

It is an amenable number.

1081379531236 is a deficient number, since it is larger than the sum of its proper divisors (811038288063).

1081379531236 is an frugal number, since it uses more digits than its factorization.

1081379531236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039898 (or 519949 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 49.

Multiplying 1081379531236 by its sum of digits (49), we get a square (52987597030564 = 7279258²).

The spelling of 1081379531236 in words is "one trillion, eighty-one billion, three hundred seventy-nine million, five hundred thirty-one thousand, two hundred thirty-six".