126321444564 has 48 divisors (see below), whose sum is σ = 336892821888. Its totient is φ = 36088023168.

The previous prime is 126321444541. The next prime is 126321444581. The reversal of 126321444564 is 465444123621.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 773314 + ... + 922310.

It is an arithmetic number, because the mean of its divisors is an integer number (7018600456).

Almost surely, 2^126321444564 is an apocalyptic number.

126321444564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

126321444564 is an abundant number, since it is smaller than the sum of its proper divisors (210571377324).

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

126321444564 is a wasteful number, since it uses less digits than its factorization.

126321444564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159104 (or 159102 counting only the distinct ones).

The product of its digits is 552960, while the sum is 42.

The spelling of 126321444564 in words is "one hundred twenty-six billion, three hundred twenty-one million, four hundred forty-four thousand, five hundred sixty-four".