11952771840 has 108 divisors (see below), whose sum is σ = 41355385344. Its totient is φ = 3187402752.

The previous prime is 11952771833. The next prime is 11952771847. The reversal of 11952771840 is 4817725911.

It is a happy number.

11952771840 is a `hidden beast` number, since 1 + 19 + 527 + 71 + 8 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (11952771833) and next prime (11952771847).

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

It is not an unprimeable number, because it can be changed into a prime (11952771847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 507264 + ... + 530303.

Almost surely, 2^11952771840 is an apocalyptic number.

11952771840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11952771840 is an abundant number, since it is smaller than the sum of its proper divisors (29402613504).

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

11952771840 is a wasteful number, since it uses less digits than its factorization.

11952771840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037594 (or 1037577 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The spelling of 11952771840 in words is "eleven billion, nine hundred fifty-two million, seven hundred seventy-one thousand, eight hundred forty".