40400000400400 has 60 divisors (see below), whose sum is σ = 97968113224272. Its totient is φ = 16008972104320.

The previous prime is 40400000400359. The next prime is 40400000400479. The reversal of 40400000400400 is 400400000404.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 471919822 + ... + 472005421.

Almost surely, 2^{40400000400400} is an apocalyptic number.

40400000400400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40400000400400 is an abundant number, since it is smaller than the sum of its proper divisors (57568112823872).

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

40400000400400 is a wasteful number, since it uses less digits than its factorization.

40400000400400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943925368 (or 943925357 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 40400000400400 its reverse (400400000404), we get a palindrome (40800400400804).

The spelling of 40400000400400 in words is "forty trillion, four hundred billion, four hundred thousand, four hundred".