421754313640 has 48 divisors (see below), whose sum is σ = 1043057684340. Its totient is φ = 153365203200.

The previous prime is 421754313637. The next prime is 421754313697. The reversal of 421754313640 is 46313457124.

It can be written as a sum of positive squares in 2 ways, for example, as 421115336356 + 638977284 = 648934^2 + 25278^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 421754313593 and 421754313602.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43564821 + ... + 43574500.

Almost surely, 2^421754313640 is an apocalyptic number.

421754313640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421754313640 is an abundant number, since it is smaller than the sum of its proper divisors (621303370700).

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

421754313640 is a wasteful number, since it uses less digits than its factorization.

421754313640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87139354 (or 87139339 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 421754313640 in words is "four hundred twenty-one billion, seven hundred fifty-four million, three hundred thirteen thousand, six hundred forty".