155166663744 has 105 divisors (see below), whose sum is σ = 460046688871. Its totient is φ = 51712767360.

The previous prime is 155166663731. The next prime is 155166663749. The reversal of 155166663744 is 447366661551.

The square root of 155166663744 is 393912.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155166663749) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 28358929 + ... + 28364399.

Almost surely, 2^155166663744 is an apocalyptic number.

155166663744 is the 393912-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155166663744

155166663744 is an abundant number, since it is smaller than the sum of its proper divisors (304880025127).

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

155166663744 is an frugal number, since it uses more digits than its factorization.

155166663744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10966 (or 5476 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 54.

The spelling of 155166663744 in words is "one hundred fifty-five billion, one hundred sixty-six million, six hundred sixty-three thousand, seven hundred forty-four".