11450972578 has 4 divisors (see below), whose sum is σ = 17176458870. Its totient is φ = 5725486288.

The previous prime is 11450972537. The next prime is 11450972609. The reversal of 11450972578 is 87527905411.

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

It can be written as a sum of positive squares in only one way, i.e., 11013033249 + 437939329 = 104943^2 + 20927^2 .

It is a super-2 number, since 2×11450972578² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2862743143 + ... + 2862743146.

Almost surely, 2^11450972578 is an apocalyptic number.

11450972578 is a deficient number, since it is larger than the sum of its proper divisors (5725486292).

11450972578 is an equidigital number, since it uses as much as digits as its factorization.

11450972578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5725486291.

The product of its (nonzero) digits is 705600, while the sum is 49.

The spelling of 11450972578 in words is "eleven billion, four hundred fifty million, nine hundred seventy-two thousand, five hundred seventy-eight".