156605649 has 8 divisors (see below), whose sum is σ = 221090400. Its totient is φ = 98262336.

The previous prime is 156605639. The next prime is 156605663. The reversal of 156605649 is 946506651.

156605649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 156605649 - 2⁴ = 156605633 is a prime.

It is a super-2 number, since 2×156605649² = 49050658597422402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 156605649.

It is not an unprimeable number, because it can be changed into a prime (156605639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1535299 + ... + 1535400.

It is an arithmetic number, because the mean of its divisors is an integer number (27636300).

Almost surely, 2^156605649 is an apocalyptic number.

It is an amenable number.

156605649 is a deficient number, since it is larger than the sum of its proper divisors (64484751).

156605649 is a wasteful number, since it uses less digits than its factorization.

156605649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3070719.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 156605649 is about 12514.2178740823. The cubic root of 156605649 is about 539.0170148708.

The spelling of 156605649 in words is "one hundred fifty-six million, six hundred five thousand, six hundred forty-nine".