421540040770 has 16 divisors (see below), whose sum is σ = 766284670008. Its totient is φ = 166946550400.

The previous prime is 421540040767. The next prime is 421540040797. The reversal of 421540040770 is 77040045124.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 400191616449 + 21348424321 = 632607^2 + 146111^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208682179 + ... + 208684198.

Almost surely, 2^421540040770 is an apocalyptic number.

421540040770 is a deficient number, since it is larger than the sum of its proper divisors (344744629238).

421540040770 is a wasteful number, since it uses less digits than its factorization.

421540040770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417366485.

The product of its (nonzero) digits is 31360, while the sum is 34.

Adding to 421540040770 its reverse (77040045124), we get a palindrome (498580085894).

The spelling of 421540040770 in words is "four hundred twenty-one billion, five hundred forty million, forty thousand, seven hundred seventy".