40400124014421 has 20 divisors (see below), whose sum is σ = 61981905316012. Its totient is φ = 26205485845248.

The previous prime is 40400124014401. The next prime is 40400124014461. The reversal of 40400124014421 is 12441042100404.

It is a happy number.

40400124014421 is a `hidden beast` number, since 4 + 0 + 400 + 1 + 240 + 14 + 4 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 38983964513796 + 1416159500625 = 6243714^2 + 1190025^2 .

It is not a de Polignac number, because 40400124014421 - 2²¹ = 40400121917269 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40400124014401) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6740091100 + ... + 6740097093.

Almost surely, 2^{40400124014421} is an apocalyptic number.

It is an amenable number.

40400124014421 is a deficient number, since it is larger than the sum of its proper divisors (21581781301591).

40400124014421 is a wasteful number, since it uses less digits than its factorization.

40400124014421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13480188242 (or 13480188233 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

Adding to 40400124014421 its reverse (12441042100404), we get a palindrome (52841166114825).

The spelling of 40400124014421 in words is "forty trillion, four hundred billion, one hundred twenty-four million, fourteen thousand, four hundred twenty-one".