400611221475542 has 128 divisors (see below), whose sum is σ = 757350649036800. Its totient is φ = 154386860348160.

The previous prime is 400611221475541. The next prime is 400611221475623. The reversal of 400611221475542 is 245574122116004.

It is a junction number, because it is equal to n+sod(n) for n = 400611221475493 and 400611221475502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400611221475541) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 68492255834 + ... + 68492261682.

It is an arithmetic number, because the mean of its divisors is an integer number (5916801945600).

Almost surely, 2^{400611221475542} is an apocalyptic number.

400611221475542 is a deficient number, since it is larger than the sum of its proper divisors (356739427561258).

400611221475542 is a wasteful number, since it uses less digits than its factorization.

400611221475542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10266.

The product of its (nonzero) digits is 537600, while the sum is 44.

The spelling of 400611221475542 in words is "four hundred trillion, six hundred eleven billion, two hundred twenty-one million, four hundred seventy-five thousand, five hundred forty-two".