120401444555 has 48 divisors (see below), whose sum is σ = 175870033920. Its totient is φ = 77499084288.

The previous prime is 120401444551. The next prime is 120401444563. The reversal of 120401444555 is 555444104021.

It is not a de Polignac number, because 120401444555 - 2² = 120401444551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (120401444551) 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 47 ways as a sum of consecutive naturals, for example, 3858506 + ... + 3889584.

It is an arithmetic number, because the mean of its divisors is an integer number (3663959040).

Almost surely, 2^120401444555 is an apocalyptic number.

120401444555 is a deficient number, since it is larger than the sum of its proper divisors (55468589365).

120401444555 is a wasteful number, since it uses less digits than its factorization.

120401444555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31508 (or 31491 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 35.

Adding to 120401444555 its reverse (555444104021), we get a palindrome (675845548576).

The spelling of 120401444555 in words is "one hundred twenty billion, four hundred one million, four hundred forty-four thousand, five hundred fifty-five".