123270357640 has 32 divisors (see below), whose sum is σ = 291956112000. Its totient is φ = 46712977344.

The previous prime is 123270357631. The next prime is 123270357643. The reversal of 123270357640 is 46753072321.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 123270357593 and 123270357602.

It is not an unprimeable number, because it can be changed into a prime (123270357643) 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, 81098160 + ... + 81099679.

It is an arithmetic number, because the mean of its divisors is an integer number (9123628500).

Almost surely, 2^123270357640 is an apocalyptic number.

123270357640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123270357640 is an abundant number, since it is smaller than the sum of its proper divisors (168685754360).

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

123270357640 is a wasteful number, since it uses less digits than its factorization.

123270357640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162197869 (or 162197865 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 40.

The spelling of 123270357640 in words is "one hundred twenty-three billion, two hundred seventy million, three hundred fifty-seven thousand, six hundred forty".