42621771672 has 80 divisors (see below), whose sum is σ = 119414033640. Its totient is φ = 14203257984.

The previous prime is 42621771637. The next prime is 42621771713. The reversal of 42621771672 is 27617712624.

42621771672 is a `hidden beast` number, since 4 + 2 + 621 + 7 + 7 + 16 + 7 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3099003 + ... + 3112725.

Almost surely, 2^42621771672 is an apocalyptic number.

It is an amenable number.

42621771672 is an abundant number, since it is smaller than the sum of its proper divisors (76792261968).

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

42621771672 is a wasteful number, since it uses less digits than its factorization.

42621771672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18534 (or 18521 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The spelling of 42621771672 in words is "forty-two billion, six hundred twenty-one million, seven hundred seventy-one thousand, six hundred seventy-two".