11455651980 has 36 divisors (see below), whose sum is σ = 34748811552. Its totient is φ = 3054840480.

The previous prime is 11455651979. The next prime is 11455652003. The reversal of 11455651980 is 8915655411.

11455651980 is a `hidden beast` number, since 1 + 1 + 4 + 5 + 56 + 519 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31821076 + ... + 31821435.

Almost surely, 2^11455651980 is an apocalyptic number.

11455651980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11455651980 is an abundant number, since it is smaller than the sum of its proper divisors (23293159572).

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

11455651980 is a wasteful number, since it uses less digits than its factorization.

11455651980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63642526 (or 63642521 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 45.

The spelling of 11455651980 in words is "eleven billion, four hundred fifty-five million, six hundred fifty-one thousand, nine hundred eighty".