123545509948 has 48 divisors (see below), whose sum is σ = 247929099264. Its totient is φ = 52768794240.

The previous prime is 123545509943. The next prime is 123545509949. The reversal of 123545509948 is 849905545321.

It is a super-2 number, since 2×123545509948² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123545509943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10712161 + ... + 10723687.

It is an arithmetic number, because the mean of its divisors is an integer number (5165189568).

Almost surely, 2^123545509948 is an apocalyptic number.

It is an amenable number.

123545509948 is an abundant number, since it is smaller than the sum of its proper divisors (124383589316).

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

123545509948 is a wasteful number, since it uses less digits than its factorization.

123545509948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12802 (or 12800 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 55.

The spelling of 123545509948 in words is "one hundred twenty-three billion, five hundred forty-five million, five hundred nine thousand, nine hundred forty-eight".