400155515115 has 32 divisors (see below), whose sum is σ = 682477132800. Its totient is φ = 199624538880.

The previous prime is 400155515107. The next prime is 400155515119. The reversal of 400155515115 is 511515551004.

It is not a de Polignac number, because 400155515115 - 2³ = 400155515107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400155515119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8863906 + ... + 8908935.

It is an arithmetic number, because the mean of its divisors is an integer number (21327410400).

Almost surely, 2^400155515115 is an apocalyptic number.

400155515115 is a deficient number, since it is larger than the sum of its proper divisors (282321617685).

400155515115 is a wasteful number, since it uses less digits than its factorization.

400155515115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17772947.

The product of its (nonzero) digits is 12500, while the sum is 33.

The spelling of 400155515115 in words is "four hundred billion, one hundred fifty-five million, five hundred fifteen thousand, one hundred fifteen".