123537134072 has 16 divisors (see below), whose sum is σ = 252689592600. Its totient is φ = 56153242720.

The previous prime is 123537134069. The next prime is 123537134087. The reversal of 123537134072 is 270431735321.

It is a happy number.

It is a super-2 number, since 2×123537134072² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 701915447 + ... + 701915622.

Almost surely, 2^123537134072 is an apocalyptic number.

It is an amenable number.

123537134072 is an abundant number, since it is smaller than the sum of its proper divisors (129152458528).

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

123537134072 is a wasteful number, since it uses less digits than its factorization.

123537134072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403831086 (or 1403831082 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 38.

Adding to 123537134072 its reverse (270431735321), we get a palindrome (393968869393).

The spelling of 123537134072 in words is "one hundred twenty-three billion, five hundred thirty-seven million, one hundred thirty-four thousand, seventy-two".