11961928620 has 72 divisors (see below), whose sum is σ = 38418909984. Its totient is φ = 3002208768.

The previous prime is 11961928597. The next prime is 11961928633. The reversal of 11961928620 is 2682916911.

11961928620 is a `hidden beast` number, since 1 + 1 + 9 + 6 + 19 + 2 + 8 + 620 = 666.

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 23 ways as a sum of consecutive naturals, for example, 1951504 + ... + 1957623.

It is an arithmetic number, because the mean of its divisors is an integer number (533595972).

Almost surely, 2^11961928620 is an apocalyptic number.

11961928620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11961928620 is an abundant number, since it is smaller than the sum of its proper divisors (26456981364).

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

11961928620 is a wasteful number, since it uses less digits than its factorization.

11961928620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3909159 (or 3909154 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The spelling of 11961928620 in words is "eleven billion, nine hundred sixty-one million, nine hundred twenty-eight thousand, six hundred twenty".