36531072381 has 8 divisors (see below), whose sum is σ = 48713331744. Its totient is φ = 24351430640.

The previous prime is 36531072329. The next prime is 36531072427. The reversal of 36531072381 is 18327013563.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 36531072381 - 2⁶ = 36531072317 is a prime.

It is a super-2 number, since 2×36531072381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36531072311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621606 + ... + 677831.

It is an arithmetic number, because the mean of its divisors is an integer number (6089166468).

Almost surely, 2^36531072381 is an apocalyptic number.

It is an amenable number.

36531072381 is a deficient number, since it is larger than the sum of its proper divisors (12182259363).

36531072381 is a wasteful number, since it uses less digits than its factorization.

36531072381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308811.

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 36531072381 in words is "thirty-six billion, five hundred thirty-one million, seventy-two thousand, three hundred eighty-one".