155780098 has 8 divisors (see below), whose sum is σ = 234344592. Its totient is φ = 77665236.

The previous prime is 155780087. The next prime is 155780113. The reversal of 155780098 is 890087551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111540 + ... + 112927.

It is an arithmetic number, because the mean of its divisors is an integer number (29293074).

Almost surely, 2^155780098 is an apocalyptic number.

155780098 is a deficient number, since it is larger than the sum of its proper divisors (78564494).

155780098 is a wasteful number, since it uses less digits than its factorization.

155780098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224816.

The product of its (nonzero) digits is 100800, while the sum is 43.

The square root of 155780098 is about 12481.1897670054. The cubic root of 155780098 is about 538.0681979854.

The spelling of 155780098 in words is "one hundred fifty-five million, seven hundred eighty thousand, ninety-eight".