156771540 has 36 divisors (see below), whose sum is σ = 475540884. Its totient is φ = 41805696.

The previous prime is 156771469. The next prime is 156771581. The reversal of 156771540 is 45177651.

156771540 is digitally balanced in base 3, 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 2 ways, for example, as 47527236 + 109244304 = 6894^2 + 10452^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 = 156771495 and 156771504.

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 11 ways as a sum of consecutive naturals, for example, 435297 + ... + 435656.

It is an arithmetic number, because the mean of its divisors is an integer number (13209469).

Almost surely, 2^156771540 is an apocalyptic number.

156771540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156771540 is an abundant number, since it is smaller than the sum of its proper divisors (318769344).

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

156771540 is a wasteful number, since it uses less digits than its factorization.

156771540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870968 (or 870963 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The square root of 156771540 is about 12520.8442207385. The cubic root of 156771540 is about 539.2072730501.

The spelling of 156771540 in words is "one hundred fifty-six million, seven hundred seventy-one thousand, five hundred forty".