400553423355520 has 64 divisors (see below), whose sum is σ = 957594911934240. Its totient is φ = 160217707668480.

The previous prime is 400553423355347. The next prime is 400553423355551. The reversal of 400553423355520 is 25553324355004.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20960479 + ... + 35220001.

Almost surely, 2^{400553423355520} is an apocalyptic number.

400553423355520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400553423355520 is an abundant number, since it is smaller than the sum of its proper divisors (557041488578720).

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

400553423355520 is a wasteful number, since it uses less digits than its factorization.

400553423355520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14303433 (or 14303421 counting only the distinct ones).

The product of its (nonzero) digits is 5400000, while the sum is 46.

The spelling of 400553423355520 in words is "four hundred trillion, five hundred fifty-three billion, four hundred twenty-three million, three hundred fifty-five thousand, five hundred twenty".