42156640472 has 8 divisors (see below), whose sum is σ = 79043700900. Its totient is φ = 21078320232.

The previous prime is 42156640451. The next prime is 42156640481. The reversal of 42156640472 is 27404665124.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2634790022 + ... + 2634790037.

Almost surely, 2^42156640472 is an apocalyptic number.

It is an amenable number.

42156640472 is a deficient number, since it is larger than the sum of its proper divisors (36887060428).

42156640472 is a wasteful number, since it uses less digits than its factorization.

42156640472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5269580065 (or 5269580061 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 41.

The spelling of 42156640472 in words is "forty-two billion, one hundred fifty-six million, six hundred forty thousand, four hundred seventy-two".