40525030981 has 2 divisors, whose sum is σ = 40525030982. Its totient is φ = 40525030980.

The previous prime is 40525030963. The next prime is 40525031021. The reversal of 40525030981 is 18903052504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40146533956 + 378497025 = 200366^2 + 19455^2 .

It is a cyclic number.

It is not a de Polignac number, because 40525030981 - 2²³ = 40516642373 is a prime.

It is a super-2 number, since 2×40525030981² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40525030981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40525030951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20262515490 + 20262515491.

It is an arithmetic number, because the mean of its divisors is an integer number (20262515491).

Almost surely, 2^40525030981 is an apocalyptic number.

It is an amenable number.

40525030981 is a deficient number, since it is larger than the sum of its proper divisors (1).

40525030981 is an equidigital number, since it uses as much as digits as its factorization.

40525030981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 40525030981 in words is "forty billion, five hundred twenty-five million, thirty thousand, nine hundred eighty-one".