161563364534 has 32 divisors (see below), whose sum is σ = 285935124384. Its totient is φ = 67497857280.

The previous prime is 161563364533. The next prime is 161563364537. The reversal of 161563364534 is 435463365161.

It is a happy number.

It is a super-2 number, since 2×161563364534² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161563364533) 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, 1145609 + ... + 1278884.

It is an arithmetic number, because the mean of its divisors is an integer number (8935472637).

Almost surely, 2^161563364534 is an apocalyptic number.

161563364534 is a deficient number, since it is larger than the sum of its proper divisors (124371759850).

161563364534 is a wasteful number, since it uses less digits than its factorization.

161563364534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424752.

The product of its digits is 2332800, while the sum is 47.

The spelling of 161563364534 in words is "one hundred sixty-one billion, five hundred sixty-three million, three hundred sixty-four thousand, five hundred thirty-four".