542287020491 has 4 divisors (see below), whose sum is σ = 542291180184. Its totient is φ = 542282860800.

The previous prime is 542287020467. The next prime is 542287020523. The reversal of 542287020491 is 194020782245.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 542287020491 - 2⁶ = 542287020427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542287020461) 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, 1877750 + ... + 2147211.

It is an arithmetic number, because the mean of its divisors is an integer number (135572795046).

Almost surely, 2^542287020491 is an apocalyptic number.

542287020491 is a deficient number, since it is larger than the sum of its proper divisors (4159693).

542287020491 is a wasteful number, since it uses less digits than its factorization.

542287020491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4159692.

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 542287020491 in words is "five hundred forty-two billion, two hundred eighty-seven million, twenty thousand, four hundred ninety-one".