11973738550 has 24 divisors (see below), whose sum is σ = 22274523000. Its totient is φ = 4788770880.

The previous prime is 11973738547. The next prime is 11973738559. The reversal of 11973738550 is 5583737911.

It is a happy number.

It is a super-2 number, since 2×11973738550² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11973738494 and 11973738503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11973738559) 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, 421186 + ... + 448714.

It is an arithmetic number, because the mean of its divisors is an integer number (928105125).

Almost surely, 2^11973738550 is an apocalyptic number.

11973738550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11973738550 is a deficient number, since it is larger than the sum of its proper divisors (10300784450).

11973738550 is a wasteful number, since it uses less digits than its factorization.

11973738550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36240 (or 36235 counting only the distinct ones).

The product of its (nonzero) digits is 793800, while the sum is 49.

The spelling of 11973738550 in words is "eleven billion, nine hundred seventy-three million, seven hundred thirty-eight thousand, five hundred fifty".