40072123452 has 12 divisors (see below), whose sum is σ = 93501621416. Its totient is φ = 13357374480.

The previous prime is 40072123439. The next prime is 40072123457. The reversal of 40072123452 is 25432127004.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40072123457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1669671799 + ... + 1669671822.

Almost surely, 2^40072123452 is an apocalyptic number.

It is an amenable number.

40072123452 is an abundant number, since it is smaller than the sum of its proper divisors (53429497964).

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

40072123452 is a wasteful number, since it uses less digits than its factorization.

40072123452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3339343628 (or 3339343626 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The spelling of 40072123452 in words is "forty billion, seventy-two million, one hundred twenty-three thousand, four hundred fifty-two".