42819915601 has 4 divisors (see below), whose sum is σ = 42822040432. Its totient is φ = 42817790772.

The previous prime is 42819915563. The next prime is 42819915623. The reversal of 42819915601 is 10651991824.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42819915601 - 2¹⁷ = 42819784529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42819915001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1031895 + ... + 1072588.

It is an arithmetic number, because the mean of its divisors is an integer number (10705510108).

Almost surely, 2^42819915601 is an apocalyptic number.

It is an amenable number.

42819915601 is a deficient number, since it is larger than the sum of its proper divisors (2124831).

42819915601 is a wasteful number, since it uses less digits than its factorization.

42819915601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2124830.

The product of its (nonzero) digits is 155520, while the sum is 46.

It can be divided in two parts, 42819 and 915601, that added together give a triangular number (958420 = T₁₃₈₄).

The spelling of 42819915601 in words is "forty-two billion, eight hundred nineteen million, nine hundred fifteen thousand, six hundred one".