155106322644 has 144 divisors (see below), whose sum is σ = 480057979968. Its totient is φ = 38500826112.

The previous prime is 155106322633. The next prime is 155106322649. The reversal of 155106322644 is 446223601551.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155106322649) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 466854 + ... + 726749.

It is an arithmetic number, because the mean of its divisors is an integer number (3333735972).

Almost surely, 2^155106322644 is an apocalyptic number.

155106322644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

155106322644 is an abundant number, since it is smaller than the sum of its proper divisors (324951657324).

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

155106322644 is a wasteful number, since it uses less digits than its factorization.

155106322644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193654 (or 1193645 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 155106322644 in words is "one hundred fifty-five billion, one hundred six million, three hundred twenty-two thousand, six hundred forty-four".