155640350 has 12 divisors (see below), whose sum is σ = 289491144. Its totient is φ = 62256120.

The previous prime is 155640347. The next prime is 155640391. The reversal of 155640350 is 53046551.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1556354 + ... + 1556453.

It is an arithmetic number, because the mean of its divisors is an integer number (24124262).

Almost surely, 2^155640350 is an apocalyptic number.

155640350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155640350 is a deficient number, since it is larger than the sum of its proper divisors (133850794).

155640350 is a wasteful number, since it uses less digits than its factorization.

155640350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3112819 (or 3112814 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 155640350 is about 12475.5901664009. The cubic root of 155640350 is about 537.9072521995.

The spelling of 155640350 in words is "one hundred fifty-five million, six hundred forty thousand, three hundred fifty".