40520120376421 has 8 divisors (see below), whose sum is σ = 47385655722944. Its totient is φ = 33923821710240.

The previous prime is 40520120376361. The next prime is 40520120376451. The reversal of 40520120376421 is 12467302102504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40520120376421 - 2¹¹ = 40520120374373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40520120376451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67309169760 + ... + 67309170361.

It is an arithmetic number, because the mean of its divisors is an integer number (5923206965368).

Almost surely, 2^{40520120376421} is an apocalyptic number.

It is an amenable number.

40520120376421 is a deficient number, since it is larger than the sum of its proper divisors (6865535346523).

40520120376421 is a wasteful number, since it uses less digits than its factorization.

40520120376421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134618340171.

The product of its (nonzero) digits is 80640, while the sum is 37.

Adding to 40520120376421 its reverse (12467302102504), we get a palindrome (52987422478925).

The spelling of 40520120376421 in words is "forty trillion, five hundred twenty billion, one hundred twenty million, three hundred seventy-six thousand, four hundred twenty-one".