434378660391 has 40 divisors (see below), whose sum is σ = 703088398320. Its totient is φ = 265669901568.

The previous prime is 434378660357. The next prime is 434378660411. The reversal of 434378660391 is 193066873434.

It is a happy number.

434378660391 is a `hidden beast` number, since 43 + 437 + 86 + 6 + 0 + 3 + 91 = 666.

It is not a de Polignac number, because 434378660391 - 2¹⁰ = 434378659367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (434378660291) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1093746 + ... + 1437023.

It is an arithmetic number, because the mean of its divisors is an integer number (17577209958).

Almost surely, 2^434378660391 is an apocalyptic number.

434378660391 is a deficient number, since it is larger than the sum of its proper divisors (268709737929).

434378660391 is a wasteful number, since it uses less digits than its factorization.

434378660391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530957 (or 2530948 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 54.

The spelling of 434378660391 in words is "four hundred thirty-four billion, three hundred seventy-eight million, six hundred sixty thousand, three hundred ninety-one".