3136453981 has 16 divisors (see below), whose sum is σ = 3392439408. Its totient is φ = 2888704000.

The previous prime is 3136453973. The next prime is 3136454011. The reversal of 3136453981 is 1893546313.

It can be written as a sum of positive squares in 8 ways, for example, as 1555119225 + 1581334756 = 39435^2 + 39766^2 .

It is a cyclic number.

It is not a de Polignac number, because 3136453981 - 2³ = 3136453973 is a prime.

It is a super-4 number, since 4×3136453981⁴ (a number of 39 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3136453921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356961 + ... + 365641.

It is an arithmetic number, because the mean of its divisors is an integer number (212027463).

Almost surely, 2^3136453981 is an apocalyptic number.

It is an amenable number.

3136453981 is a deficient number, since it is larger than the sum of its proper divisors (255985427).

3136453981 is a wasteful number, since it uses less digits than its factorization.

3136453981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9152.

The product of its digits is 233280, while the sum is 43.

The square root of 3136453981 is about 56004.0532550993. The cubic root of 3136453981 is about 1463.7929122026.

The spelling of 3136453981 in words is "three billion, one hundred thirty-six million, four hundred fifty-three thousand, nine hundred eighty-one".