42007621780 has 24 divisors (see below), whose sum is σ = 88222945608. Its totient is φ = 16801726848.

The previous prime is 42007621723. The next prime is 42007621801. The reversal of 42007621780 is 8712670024.

42007621780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7778181636 + 34229440144 = 88194^2 + 185012^2 .

It is a super-2 number, since 2×42007621780² (a number of 22 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 7 ways as a sum of consecutive naturals, for example, 201862 + ... + 353218.

It is an arithmetic number, because the mean of its divisors is an integer number (3675956067).

Almost surely, 2^42007621780 is an apocalyptic number.

It is an amenable number.

42007621780 is an abundant number, since it is smaller than the sum of its proper divisors (46215323828).

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

42007621780 is a wasteful number, since it uses less digits than its factorization.

42007621780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165243 (or 165241 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 37.

The spelling of 42007621780 in words is "forty-two billion, seven million, six hundred twenty-one thousand, seven hundred eighty".