40481123861 has 2 divisors, whose sum is σ = 40481123862. Its totient is φ = 40481123860.

The previous prime is 40481123833. The next prime is 40481123897. The reversal of 40481123861 is 16832118404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24578400625 + 15902723236 = 156775^2 + 126106^2 .

It is a cyclic number.

It is not a de Polignac number, because 40481123861 - 2¹⁴ = 40481107477 is a prime.

It is a super-3 number, since 3×40481123861³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40481123801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20240561930 + 20240561931.

It is an arithmetic number, because the mean of its divisors is an integer number (20240561931).

Almost surely, 2^40481123861 is an apocalyptic number.

It is an amenable number.

40481123861 is a deficient number, since it is larger than the sum of its proper divisors (1).

40481123861 is an equidigital number, since it uses as much as digits as its factorization.

40481123861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 38.

The spelling of 40481123861 in words is "forty billion, four hundred eighty-one million, one hundred twenty-three thousand, eight hundred sixty-one".