123781078670 has 16 divisors (see below), whose sum is σ = 222859053648. Its totient is φ = 49500628800.

The previous prime is 123781078661. The next prime is 123781078679. The reversal of 123781078670 is 76870187321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (123781078661) and next prime (123781078679).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123781078679) 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, 1431224 + ... + 1515243.

It is an arithmetic number, because the mean of its divisors is an integer number (13928690853).

Almost surely, 2^123781078670 is an apocalyptic number.

123781078670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123781078670 is a deficient number, since it is larger than the sum of its proper divisors (99077974978).

123781078670 is a wasteful number, since it uses less digits than its factorization.

123781078670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2950675.

The product of its (nonzero) digits is 790272, while the sum is 50.

The spelling of 123781078670 in words is "one hundred twenty-three billion, seven hundred eighty-one million, seventy-eight thousand, six hundred seventy".