40421293785 has 64 divisors (see below), whose sum is σ = 75784608000. Its totient is φ = 20384939520.

The previous prime is 40421293777. The next prime is 40421293789. The reversal of 40421293785 is 58739212404.

It is not a de Polignac number, because 40421293785 - 2³ = 40421293777 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 40421293785.

It is not an unprimeable number, because it can be changed into a prime (40421293789) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1373101 + ... + 1402229.

It is an arithmetic number, because the mean of its divisors is an integer number (1184134500).

Almost surely, 2^40421293785 is an apocalyptic number.

40421293785 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40421293785 is a deficient number, since it is larger than the sum of its proper divisors (35363314215).

40421293785 is a wasteful number, since it uses less digits than its factorization.

40421293785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29703 (or 29697 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 40421293785 in words is "forty billion, four hundred twenty-one million, two hundred ninety-three thousand, seven hundred eighty-five".