42019156376721 has 24 divisors (see below), whose sum is σ = 61138023804000. Its totient is φ = 27807996820416.

The previous prime is 42019156376719. The next prime is 42019156376789. The reversal of 42019156376721 is 12767365191024.

42019156376721 is a `hidden beast` number, since 4 + 2 + 0 + 1 + 9 + 1 + 563 + 7 + 6 + 72 + 1 = 666.

It is not a de Polignac number, because 42019156376721 - 2¹ = 42019156376719 is a prime.

It is a super-2 number, since 2×42019156376721² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42019156377721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 223694386 + ... + 223882148.

It is an arithmetic number, because the mean of its divisors is an integer number (2547417658500).

Almost surely, 2^{42019156376721} is an apocalyptic number.

It is an amenable number.

42019156376721 is a deficient number, since it is larger than the sum of its proper divisors (19118867427279).

42019156376721 is a wasteful number, since it uses less digits than its factorization.

42019156376721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369405 (or 369402 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The spelling of 42019156376721 in words is "forty-two trillion, nineteen billion, one hundred fifty-six million, three hundred seventy-six thousand, seven hundred twenty-one".