421034733640 has 16 divisors (see below), whose sum is σ = 947328150780. Its totient is φ = 168413893440.

The previous prime is 421034733601. The next prime is 421034733649. The reversal of 421034733640 is 46337430124.

It can be written as a sum of positive squares in 2 ways, for example, as 383267475396 + 37767258244 = 619086^2 + 194338^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 421034733640.

It is not an unprimeable number, because it can be changed into a prime (421034733649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5262934131 + ... + 5262934210.

Almost surely, 2^421034733640 is an apocalyptic number.

421034733640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421034733640 is an abundant number, since it is smaller than the sum of its proper divisors (526293417140).

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

421034733640 is a wasteful number, since it uses less digits than its factorization.

421034733640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10525868352 (or 10525868348 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 37.

The spelling of 421034733640 in words is "four hundred twenty-one billion, thirty-four million, seven hundred thirty-three thousand, six hundred forty".