32490861991531 has 4 divisors (see below), whose sum is σ = 32490916672464. Its totient is φ = 32490807310600.

The previous prime is 32490861991501. The next prime is 32490861991537. The reversal of 32490861991531 is 13519916809423.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 32490861991531 - 2¹⁷ = 32490861860459 is a prime.

It is a super-2 number, since 2×32490861991531² (a number of 28 digits) contains 22 as substring.

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 32490861991531.

It is not an unprimeable number, because it can be changed into a prime (32490861991537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26439280 + ... + 27640861.

It is an arithmetic number, because the mean of its divisors is an integer number (8122729168116).

Almost surely, 2^{32490861991531} is an apocalyptic number.

32490861991531 is a deficient number, since it is larger than the sum of its proper divisors (54680933).

32490861991531 is an equidigital number, since it uses as much as digits as its factorization.

32490861991531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54680932.

The product of its (nonzero) digits is 12597120, while the sum is 61.

The spelling of 32490861991531 in words is "thirty-two trillion, four hundred ninety billion, eight hundred sixty-one million, nine hundred ninety-one thousand, five hundred thirty-one".