40878520493 has 2 divisors, whose sum is σ = 40878520494. Its totient is φ = 40878520492.

The previous prime is 40878520489. The next prime is 40878520513. The reversal of 40878520493 is 39402587804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27158380804 + 13720139689 = 164798^2 + 117133^2 .

It is a cyclic number.

It is not a de Polignac number, because 40878520493 - 2² = 40878520489 is a prime.

It is a super-3 number, since 3×40878520493³ (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 (40878580493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20439260246 + 20439260247.

It is an arithmetic number, because the mean of its divisors is an integer number (20439260247).

Almost surely, 2^40878520493 is an apocalyptic number.

It is an amenable number.

40878520493 is a deficient number, since it is larger than the sum of its proper divisors (1).

40878520493 is an equidigital number, since it uses as much as digits as its factorization.

40878520493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 40878520493 in words is "forty billion, eight hundred seventy-eight million, five hundred twenty thousand, four hundred ninety-three".