542045025261 has 6 divisors (see below), whose sum is σ = 782953925390. Its totient is φ = 361363350168.

The previous prime is 542045025187. The next prime is 542045025311. The reversal of 542045025261 is 162520540245.

542045025261 is a `hidden beast` number, since 5 + 42 + 0 + 4 + 502 + 52 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 540216180036 + 1828845225 = 734994^2 + 42765^2 .

It is not a de Polignac number, because 542045025261 - 2²⁶ = 541977916397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542045021261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30113612506 + ... + 30113612523.

Almost surely, 2^542045025261 is an apocalyptic number.

It is an amenable number.

542045025261 is a deficient number, since it is larger than the sum of its proper divisors (240908900129).

542045025261 is a wasteful number, since it uses less digits than its factorization.

542045025261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60227225035 (or 60227225032 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The spelling of 542045025261 in words is "five hundred forty-two billion, forty-five million, twenty-five thousand, two hundred sixty-one".