421566400749 has 16 divisors (see below), whose sum is σ = 616747364352. Its totient is φ = 254530655808.

The previous prime is 421566400733. The next prime is 421566400763. The reversal of 421566400749 is 947004665124.

It is a happy number.

It is not a de Polignac number, because 421566400749 - 2⁴ = 421566400733 is a prime.

It is a super-2 number, since 2×421566400749² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421566400698 and 421566400707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421566400249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101973357 + ... + 101977490.

It is an arithmetic number, because the mean of its divisors is an integer number (38546710272).

Almost surely, 2^421566400749 is an apocalyptic number.

It is an amenable number.

421566400749 is a deficient number, since it is larger than the sum of its proper divisors (195180963603).

421566400749 is a wasteful number, since it uses less digits than its factorization.

421566400749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203950916.

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 421566400749 in words is "four hundred twenty-one billion, five hundred sixty-six million, four hundred thousand, seven hundred forty-nine".