421353678499 has 16 divisors (see below), whose sum is σ = 459556915104. Its totient is φ = 383999616000.

The previous prime is 421353678479. The next prime is 421353678547. The reversal of 421353678499 is 994876353124.

It is a happy number.

It is not a de Polignac number, because 421353678499 - 2¹³ = 421353670307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421353678419) 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, 8944 + ... + 918034.

It is an arithmetic number, because the mean of its divisors is an integer number (28722307194).

Almost surely, 2^421353678499 is an apocalyptic number.

421353678499 is a deficient number, since it is larger than the sum of its proper divisors (38203236605).

421353678499 is a wasteful number, since it uses less digits than its factorization.

421353678499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909558.

The product of its digits is 39191040, while the sum is 61.

The spelling of 421353678499 in words is "four hundred twenty-one billion, three hundred fifty-three million, six hundred seventy-eight thousand, four hundred ninety-nine".