155749950 has 36 divisors (see below), whose sum is σ = 418449408. Its totient is φ = 41533200.

The previous prime is 155749837. The next prime is 155749969. The reversal of 155749950 is 59947551.

155749950 is a `hidden beast` number, since 1 + 557 + 4 + 9 + 95 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 155749896 and 155749905.

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 17 ways as a sum of consecutive naturals, for example, 172606 + ... + 173505.

Almost surely, 2^155749950 is an apocalyptic number.

155749950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155749950 is an abundant number, since it is smaller than the sum of its proper divisors (262699458).

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

155749950 is a wasteful number, since it uses less digits than its factorization.

155749950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346129 (or 346121 counting only the distinct ones).

The product of its (nonzero) digits is 283500, while the sum is 45.

The square root of 155749950 is about 12479.9819711408. The cubic root of 155749950 is about 538.0334851074.

The spelling of 155749950 in words is "one hundred fifty-five million, seven hundred forty-nine thousand, nine hundred fifty".