155897650 has 48 divisors (see below), whose sum is σ = 315388296. Its totient is φ = 57093120.

The previous prime is 155897579. The next prime is 155897659. The reversal of 155897650 is 56798551.

155897650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 83119689 + 72777961 = 9117^2 + 8531^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 155897650.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155897659) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28972 + ... + 33928.

Almost surely, 2^155897650 is an apocalyptic number.

155897650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155897650 is an abundant number, since it is smaller than the sum of its proper divisors (159490646).

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

155897650 is a wasteful number, since it uses less digits than its factorization.

155897650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5023 (or 5018 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 46.

The square root of 155897650 is about 12485.8980453951. The cubic root of 155897650 is about 538.2035064330.

Subtracting from 155897650 its reverse (56798551), we obtain a palindrome (99099099).

The spelling of 155897650 in words is "one hundred fifty-five million, eight hundred ninety-seven thousand, six hundred fifty".