155401244001040 has 80 divisors (see below), whose sum is σ = 402696102942720. Its totient is φ = 55424839956480.

The previous prime is 155401244001037. The next prime is 155401244001041. The reversal of 155401244001040 is 40100442104551.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 155401244000993 and 155401244001011.

It is not an unprimeable number, because it can be changed into a prime (155401244001041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3006964176 + ... + 3007015855.

It is an arithmetic number, because the mean of its divisors is an integer number (5033701286784).

Almost surely, 2^{155401244001040} is an apocalyptic number.

155401244001040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155401244001040 is an abundant number, since it is smaller than the sum of its proper divisors (247294858941680).

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

155401244001040 is a wasteful number, since it uses less digits than its factorization.

155401244001040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6013980080 (or 6013980074 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 31.

Adding to 155401244001040 its reverse (40100442104551), we get a palindrome (195501686105591).

The spelling of 155401244001040 in words is "one hundred fifty-five trillion, four hundred one billion, two hundred forty-four million, one thousand, forty".