11451353520 has 80 divisors (see below), whose sum is σ = 35651727072. Its totient is φ = 3040573440.

The previous prime is 11451353497. The next prime is 11451353533. The reversal of 11451353520 is 2535315411.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×11451353520² (a number of 21 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46471 + ... + 158310.

Almost surely, 2^11451353520 is an apocalyptic number.

11451353520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11451353520 is an abundant number, since it is smaller than the sum of its proper divisors (24200373552).

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

11451353520 is a wasteful number, since it uses less digits than its factorization.

11451353520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205030 (or 205024 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 11451353520 its reverse (2535315411), we get a palindrome (13986668931).

The spelling of 11451353520 in words is "eleven billion, four hundred fifty-one million, three hundred fifty-three thousand, five hundred twenty".