542405646261 has 12 divisors (see below), whose sum is σ = 808748204160. Its totient is φ = 349939126440.

The previous prime is 542405646253. The next prime is 542405646319. The reversal of 542405646261 is 162646504245.

542405646261 is a `hidden beast` number, since 5 + 4 + 24 + 0 + 564 + 6 + 2 + 61 = 666.

It is not a de Polignac number, because 542405646261 - 2³ = 542405646253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542405636261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 972052851 + ... + 972053408.

It is an arithmetic number, because the mean of its divisors is an integer number (67395683680).

Almost surely, 2^542405646261 is an apocalyptic number.

It is an amenable number.

542405646261 is a deficient number, since it is larger than the sum of its proper divisors (266342557899).

542405646261 is a wasteful number, since it uses less digits than its factorization.

542405646261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944106296 (or 1944106293 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 45.

The spelling of 542405646261 in words is "five hundred forty-two billion, four hundred five million, six hundred forty-six thousand, two hundred sixty-one".