155640850 has 24 divisors (see below), whose sum is σ = 289825200. Its totient is φ = 62184720.

The previous prime is 155640811. The next prime is 155640857. The reversal of 155640850 is 58046551.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (155640857) 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 11 ways as a sum of consecutive naturals, for example, 73101 + ... + 75199.

It is an arithmetic number, because the mean of its divisors is an integer number (12076050).

Almost surely, 2^155640850 is an apocalyptic number.

155640850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155640850 is a deficient number, since it is larger than the sum of its proper divisors (134184350).

155640850 is a wasteful number, since it uses less digits than its factorization.

155640850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3594 (or 3589 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 34.

The square root of 155640850 is about 12475.6102055170. The cubic root of 155640850 is about 537.9078282141.

The spelling of 155640850 in words is "one hundred fifty-five million, six hundred forty thousand, eight hundred fifty".