136771520 has 56 divisors (see below), whose sum is σ = 327074784. Its totient is φ = 54475776.

The previous prime is 136771493. The next prime is 136771529. The reversal of 136771520 is 25177631.

It is a super-2 number, since 2×136771520² = 37412897366220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136771529) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 87869 + ... + 89411.

Almost surely, 2^136771520 is an apocalyptic number.

136771520 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 136771520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163537392).

136771520 is an abundant number, since it is smaller than the sum of its proper divisors (190303264).

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

136771520 is a wasteful number, since it uses less digits than its factorization.

136771520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837 (or 1827 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 136771520 is about 11694.9356560864. The cubic root of 136771520 is about 515.2269336382.

The spelling of 136771520 in words is "one hundred thirty-six million, seven hundred seventy-one thousand, five hundred twenty".