400195396458 has 768 divisors, whose sum is σ = 1182545215488. Its totient is φ = 95800320000.

The previous prime is 400195396423. The next prime is 400195396463. The reversal of 400195396458 is 854693591004.

400195396458 is a `hidden beast` number, since 40 + 0 + 1 + 9 + 539 + 64 + 5 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 3151144791 + ... + 3151144917.

It is an arithmetic number, because the mean of its divisors is an integer number (1539772416).

Almost surely, 2^400195396458 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400195396458, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (591272607744).

400195396458 is an abundant number, since it is smaller than the sum of its proper divisors (782349819030).

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

400195396458 is a wasteful number, since it uses less digits than its factorization.

400195396458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

It can be divided in two parts, 4001 and 95396458, that added together give a palindrome (95400459).

The spelling of 400195396458 in words is "four hundred billion, one hundred ninety-five million, three hundred ninety-six thousand, four hundred fifty-eight".