400145522550 has 24 divisors (see below), whose sum is σ = 992360896296. Its totient is φ = 106705472640.

The previous prime is 400145522537. The next prime is 400145522551. The reversal of 400145522550 is 55225541004.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400145522551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1333818259 + ... + 1333818558.

It is an arithmetic number, because the mean of its divisors is an integer number (41348370679).

Almost surely, 2^400145522550 is an apocalyptic number.

400145522550 is an abundant number, since it is smaller than the sum of its proper divisors (592215373746).

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

400145522550 is a wasteful number, since it uses less digits than its factorization.

400145522550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2667636832 (or 2667636827 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 33.

The spelling of 400145522550 in words is "four hundred billion, one hundred forty-five million, five hundred twenty-two thousand, five hundred fifty".