15533450040 has 32 divisors (see below), whose sum is σ = 46600350480. Its totient is φ = 4142253312.

The previous prime is 15533450033. The next prime is 15533450063. The reversal of 15533450040 is 4005433551.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64722589 + ... + 64722828.

Almost surely, 2^15533450040 is an apocalyptic number.

15533450040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15533450040 is an abundant number, since it is smaller than the sum of its proper divisors (31066900440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15533450040 is a wasteful number, since it uses less digits than its factorization.

15533450040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129445431 (or 129445427 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 15533450040 its reverse (4005433551), we get a palindrome (19538883591).

The spelling of 15533450040 in words is "fifteen billion, five hundred thirty-three million, four hundred fifty thousand, forty".