155196540 has 192 divisors, whose sum is σ = 509214720. Its totient is φ = 39191040.

The previous prime is 155196539. The next prime is 155196577. The reversal of 155196540 is 45691551.

155196540 is a `hidden beast` number, since 1 + 551 + 9 + 65 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 155196495 and 155196504.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 1221957 + ... + 1222083.

It is an arithmetic number, because the mean of its divisors is an integer number (2652160).

Almost surely, 2^155196540 is an apocalyptic number.

155196540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155196540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254607360).

155196540 is an abundant number, since it is smaller than the sum of its proper divisors (354018180).

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

155196540 is a wasteful number, since it uses less digits than its factorization.

155196540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 155196540 is about 12457.7903337630. The cubic root of 155196540 is about 537.3954828328.

The spelling of 155196540 in words is "one hundred fifty-five million, one hundred ninety-six thousand, five hundred forty".