155649487 has 16 divisors (see below), whose sum is σ = 186066432. Its totient is φ = 127306080.

The previous prime is 155649479. The next prime is 155649521. The reversal of 155649487 is 784946551.

It is a happy number.

155649487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 155649487 - 2³ = 155649479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155649487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155649427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86208 + ... + 87994.

It is an arithmetic number, because the mean of its divisors is an integer number (11629152).

Almost surely, 2^155649487 is an apocalyptic number.

155649487 is a deficient number, since it is larger than the sum of its proper divisors (30416945).

155649487 is a wasteful number, since it uses less digits than its factorization.

155649487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358.

The product of its digits is 1209600, while the sum is 49.

The square root of 155649487 is about 12475.9563561276. The cubic root of 155649487 is about 537.9177780955.

The spelling of 155649487 in words is "one hundred fifty-five million, six hundred forty-nine thousand, four hundred eighty-seven".