11631545620 has 24 divisors (see below), whose sum is σ = 25268531400. Its totient is φ = 4492182912.

The previous prime is 11631545587. The next prime is 11631545659. The reversal of 11631545620 is 2654513611.

It can be written as a sum of positive squares in 4 ways, for example, as 4054887684 + 7576657936 = 63678^2 + 87044^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10026615 + ... + 10027774.

It is an arithmetic number, because the mean of its divisors is an integer number (1052855475).

Almost surely, 2^11631545620 is an apocalyptic number.

11631545620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11631545620 is an abundant number, since it is smaller than the sum of its proper divisors (13636985780).

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

11631545620 is a wasteful number, since it uses less digits than its factorization.

11631545620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20054427 (or 20054425 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 11631545620 in words is "eleven billion, six hundred thirty-one million, five hundred forty-five thousand, six hundred twenty".