501155217272042 has 4 divisors (see below), whose sum is σ = 751732825908066. Its totient is φ = 250577608636020.

The previous prime is 501155217272033. The next prime is 501155217272089. The reversal of 501155217272042 is 240272712551105.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 450486574159561 + 50668643112481 = 21224669^2 + 7118191^2 .

It is a junction number, because it is equal to n+sod(n) for n = 501155217271984 and 501155217272002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125288804318009 + ... + 125288804318012.

Almost surely, 2^{501155217272042} is an apocalyptic number.

501155217272042 is a deficient number, since it is larger than the sum of its proper divisors (250577608636024).

501155217272042 is a wasteful number, since it uses less digits than its factorization.

501155217272042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250577608636023.

The product of its (nonzero) digits is 392000, while the sum is 44.

The spelling of 501155217272042 in words is "five hundred one trillion, one hundred fifty-five billion, two hundred seventeen million, two hundred seventy-two thousand, forty-two".