42340156261566 has 16 divisors (see below), whose sum is σ = 84680539841664. Its totient is φ = 14113347534104.

The previous prime is 42340156261561. The next prime is 42340156261573. The reversal of 42340156261566 is 66516265104324.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42340156261561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7000650 + ... + 11562413.

It is an arithmetic number, because the mean of its divisors is an integer number (5292533740104).

Almost surely, 2^{42340156261566} is an apocalyptic number.

42340156261566 is an abundant number, since it is smaller than the sum of its proper divisors (42340383580098).

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

42340156261566 is a wasteful number, since it uses less digits than its factorization.

42340156261566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18943215.

The product of its (nonzero) digits is 6220800, while the sum is 51.

The spelling of 42340156261566 in words is "forty-two trillion, three hundred forty billion, one hundred fifty-six million, two hundred sixty-one thousand, five hundred sixty-six".