11477721620 has 24 divisors (see below), whose sum is σ = 24134920488. Its totient is φ = 4585049600.

The previous prime is 11477721617. The next prime is 11477721623. The reversal of 11477721620 is 2612777411.

It is an interprime number because it is at equal distance from previous prime (11477721617) and next prime (11477721623).

It can be written as a sum of positive squares in 4 ways, for example, as 61653904 + 11416067716 = 7852^2 + 106846^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11477721623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361841 + ... + 392280.

It is an arithmetic number, because the mean of its divisors is an integer number (1005621687).

Almost surely, 2^11477721620 is an apocalyptic number.

11477721620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11477721620 is an abundant number, since it is smaller than the sum of its proper divisors (12657198868).

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

11477721620 is a wasteful number, since it uses less digits than its factorization.

11477721620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754891 (or 754889 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 38.

The spelling of 11477721620 in words is "eleven billion, four hundred seventy-seven million, seven hundred twenty-one thousand, six hundred twenty".