155399444145 has 96 divisors (see below), whose sum is σ = 310724563968. Its totient is φ = 71136000000.

The previous prime is 155399444129. The next prime is 155399444323. The reversal of 155399444145 is 541444993551.

155399444145 is a `hidden beast` number, since 1 + 5 + 53 + 9 + 9 + 444 + 145 = 666.

It is not a de Polignac number, because 155399444145 - 2⁴ = 155399444129 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 155399444091 and 155399444100.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 505645 + ... + 752645.

It is an arithmetic number, because the mean of its divisors is an integer number (3236714208).

Almost surely, 2^155399444145 is an apocalyptic number.

155399444145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155399444145 is a deficient number, since it is larger than the sum of its proper divisors (155325119823).

155399444145 is a wasteful number, since it uses less digits than its factorization.

155399444145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247095 (or 247092 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 54.

The spelling of 155399444145 in words is "one hundred fifty-five billion, three hundred ninety-nine million, four hundred forty-four thousand, one hundred forty-five".