155220680 has 16 divisors (see below), whose sum is σ = 349246620. Its totient is φ = 62088256.

The previous prime is 155220679. The next prime is 155220683. The reversal of 155220680 is 86022551.

It can be written as a sum of positive squares in 2 ways, for example, as 154803364 + 417316 = 12442^2 + 646^2 .

It is not an unprimeable number, because it can be changed into a prime (155220683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1940219 + ... + 1940298.

Almost surely, 2^155220680 is an apocalyptic number.

155220680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155220680 is an abundant number, since it is smaller than the sum of its proper divisors (194025940).

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

155220680 is a wasteful number, since it uses less digits than its factorization.

155220680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3880528 (or 3880524 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 155220680 is about 12458.7591677502. The cubic root of 155220680 is about 537.4233443955.

The spelling of 155220680 in words is "one hundred fifty-five million, two hundred twenty thousand, six hundred eighty".