42820555739 has 16 divisors (see below), whose sum is σ = 48130092864. Its totient is φ = 37799731200.

The previous prime is 42820555727. The next prime is 42820555741. The reversal of 42820555739 is 93755502824.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42820555739 - 2⁸ = 42820555483 is a prime.

It is a super-2 number, since 2×42820555739² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42820555709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1613699 + ... + 1640019.

It is an arithmetic number, because the mean of its divisors is an integer number (3008130804).

Almost surely, 2^42820555739 is an apocalyptic number.

42820555739 is a deficient number, since it is larger than the sum of its proper divisors (5309537125).

42820555739 is a wasteful number, since it uses less digits than its factorization.

42820555739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31798.

The product of its (nonzero) digits is 3024000, while the sum is 50.

The spelling of 42820555739 in words is "forty-two billion, eight hundred twenty million, five hundred fifty-five thousand, seven hundred thirty-nine".