133557023464 has 8 divisors (see below), whose sum is σ = 250419419010. Its totient is φ = 66778511728.

The previous prime is 133557023419. The next prime is 133557023519. The reversal of 133557023464 is 464320755331.

It can be written as a sum of positive squares in only one way, i.e., 72276020964 + 61281002500 = 268842^2 + 247550^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 133557023464.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8347313959 + ... + 8347313974.

Almost surely, 2^133557023464 is an apocalyptic number.

It is an amenable number.

133557023464 is a deficient number, since it is larger than the sum of its proper divisors (116862395546).

133557023464 is a wasteful number, since it uses less digits than its factorization.

133557023464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16694627939 (or 16694627935 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 43.

Adding to 133557023464 its reverse (464320755331), we get a palindrome (597877778795).

The spelling of 133557023464 in words is "one hundred thirty-three billion, five hundred fifty-seven million, twenty-three thousand, four hundred sixty-four".