155640576 has 288 divisors, whose sum is σ = 543932928. Its totient is φ = 38338560.

The previous prime is 155640539. The next prime is 155640581. The reversal of 155640576 is 675046551.

It is a super-2 number, since 2×155640576² = 48447977795223552, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1188031 + ... + 1188161.

It is an arithmetic number, because the mean of its divisors is an integer number (1888656).

Almost surely, 2^155640576 is an apocalyptic number.

155640576 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155640576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271966464).

155640576 is an abundant number, since it is smaller than the sum of its proper divisors (388292352).

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

155640576 is a wasteful number, since it uses less digits than its factorization.

155640576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 155640576 is about 12475.5992240854. The cubic root of 155640576 is about 537.9075125583.

The spelling of 155640576 in words is "one hundred fifty-five million, six hundred forty thousand, five hundred seventy-six".