1565488477 has 16 divisors (see below), whose sum is σ = 1825528320. Its totient is φ = 1314700848.

The previous prime is 1565488471. The next prime is 1565488501. The reversal of 1565488477 is 7748845651.

It is a cyclic number.

It is not a de Polignac number, because 1565488477 - 2¹⁵ = 1565455709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1565488471) 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, 120618 + ... + 132964.

It is an arithmetic number, because the mean of its divisors is an integer number (114095520).

Almost surely, 2^1565488477 is an apocalyptic number.

It is an amenable number.

1565488477 is a deficient number, since it is larger than the sum of its proper divisors (260039843).

1565488477 is a wasteful number, since it uses less digits than its factorization.

1565488477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12720.

The product of its digits is 7526400, while the sum is 55.

The square root of 1565488477 is about 39566.2542705270. The cubic root of 1565488477 is about 1161.1365389278.

It can be divided in two parts, 156548 and 8477, that added together give a triangular number (165025 = T₅₇₄).

The spelling of 1565488477 in words is "one billion, five hundred sixty-five million, four hundred eighty-eight thousand, four hundred seventy-seven".