123542531770 has 32 divisors (see below), whose sum is σ = 254630648448. Its totient is φ = 42276437568.

The previous prime is 123542531759. The next prime is 123542531779. The reversal of 123542531770 is 77135245321.

It is a happy number.

It is a super-2 number, since 2×123542531770² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123542531779) 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, 1650669 + ... + 1723888.

It is an arithmetic number, because the mean of its divisors is an integer number (7957207764).

Almost surely, 2^123542531770 is an apocalyptic number.

123542531770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123542531770 is an abundant number, since it is smaller than the sum of its proper divisors (131088116678).

123542531770 is a wasteful number, since it uses less digits than its factorization.

123542531770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3375094.

The product of its (nonzero) digits is 176400, while the sum is 40.

The spelling of 123542531770 in words is "one hundred twenty-three billion, five hundred forty-two million, five hundred thirty-one thousand, seven hundred seventy".