40981077438 has 32 divisors (see below), whose sum is σ = 99181096704. Its totient is φ = 11020121472.

The previous prime is 40981077437. The next prime is 40981077457. The reversal of 40981077438 is 83477018904.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40981077437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28697520 + ... + 28698947.

It is an arithmetic number, because the mean of its divisors is an integer number (3099409272).

Almost surely, 2^40981077438 is an apocalyptic number.

40981077438 is an abundant number, since it is smaller than the sum of its proper divisors (58200019266).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40981077438 is a wasteful number, since it uses less digits than its factorization.

40981077438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57396496.

The product of its (nonzero) digits is 1354752, while the sum is 51.

It can be divided in two parts, 4098107 and 7438, that added together give a triangular number (4105545 = T₂₈₆₅).

The spelling of 40981077438 in words is "forty billion, nine hundred eighty-one million, seventy-seven thousand, four hundred thirty-eight".