400545555 has 32 divisors (see below), whose sum is σ = 676704000. Its totient is φ = 201750912.

The previous prime is 400545547. The next prime is 400545569. The reversal of 400545555 is 555545004.

It is not a de Polignac number, because 400545555 - 2³ = 400545547 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97452 + ... + 101478.

It is an arithmetic number, because the mean of its divisors is an integer number (21147000).

Almost surely, 2^400545555 is an apocalyptic number.

400545555 is a deficient number, since it is larger than the sum of its proper divisors (276158445).

400545555 is a wasteful number, since it uses less digits than its factorization.

400545555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4403.

The product of its (nonzero) digits is 50000, while the sum is 33.

The square root of 400545555 is about 20013.6342276959. The cubic root of 400545555 is about 737.1411211886.

The spelling of 400545555 in words is "four hundred million, five hundred forty-five thousand, five hundred fifty-five".