521535077451442 has 8 divisors (see below), whose sum is σ = 784313676888300. Its totient is φ = 260097185155344.

The previous prime is 521535077451431. The next prime is 521535077451499. The reversal of 521535077451442 is 244154770535125.

It can be written as a sum of positive squares in 2 ways, for example, as 503514959061321 + 18020118390121 = 22439139^2 + 4245011^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335176784217 + ... + 335176785772.

Almost surely, 2^{521535077451442} is an apocalyptic number.

521535077451442 is a deficient number, since it is larger than the sum of its proper divisors (262778599436858).

521535077451442 is a wasteful number, since it uses less digits than its factorization.

521535077451442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670353570380.

The product of its (nonzero) digits is 23520000, while the sum is 55.

The spelling of 521535077451442 in words is "five hundred twenty-one trillion, five hundred thirty-five billion, seventy-seven million, four hundred fifty-one thousand, four hundred forty-two".