542507354745521 has 12 divisors (see below), whose sum is σ = 596316646034676. Its totient is φ = 493182790103520.

The previous prime is 542507354745487. The next prime is 542507354745527. The reversal of 542507354745521 is 125547453705245.

It can be written as a sum of positive squares in 2 ways, for example, as 49816705029025 + 492690649716496 = 7058095^2 + 22196636^2 .

It is not a de Polignac number, because 542507354745521 - 2⁴² = 538109308234417 is a prime.

It is a super-2 number, since 2×542507354745521² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542507354745527) 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, 15469646 + ... + 36391271.

It is an arithmetic number, because the mean of its divisors is an integer number (49693053836223).

Almost surely, 2^{542507354745521} is an apocalyptic number.

It is an amenable number.

542507354745521 is a deficient number, since it is larger than the sum of its proper divisors (53809291289155).

542507354745521 is a wasteful number, since it uses less digits than its factorization.

542507354745521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51947392 (or 51947381 counting only the distinct ones).

The product of its (nonzero) digits is 117600000, while the sum is 59.

The spelling of 542507354745521 in words is "five hundred forty-two trillion, five hundred seven billion, three hundred fifty-four million, seven hundred forty-five thousand, five hundred twenty-one".