1534561963 has 4 divisors (see below), whose sum is σ = 1674067608. Its totient is φ = 1395056320.

The previous prime is 1534561937. The next prime is 1534561991. The reversal of 1534561963 is 3691654351.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1534561963 - 2²¹ = 1532464811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1534561663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69752806 + ... + 69752827.

It is an arithmetic number, because the mean of its divisors is an integer number (418516902).

Almost surely, 2^1534561963 is an apocalyptic number.

1534561963 is a deficient number, since it is larger than the sum of its proper divisors (139505645).

1534561963 is a wasteful number, since it uses less digits than its factorization.

1534561963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139505644.

The product of its digits is 291600, while the sum is 43.

The square root of 1534561963 is about 39173.4854589172. The cubic root of 1534561963 is about 1153.4394729428.

The spelling of 1534561963 in words is "one billion, five hundred thirty-four million, five hundred sixty-one thousand, nine hundred sixty-three".