252077191642 has 4 divisors (see below), whose sum is σ = 378115787466. Its totient is φ = 126038595820.

The previous prime is 252077191603. The next prime is 252077191643. The reversal of 252077191642 is 246191770252.

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., 175308852601 + 76768339041 = 418699^2 + 277071^2 .

It is a super-2 number, since 2×252077191642² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 252077191592 and 252077191601.

It is not an unprimeable number, because it can be changed into a prime (252077191643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63019297909 + ... + 63019297912.

Almost surely, 2^252077191642 is an apocalyptic number.

252077191642 is a deficient number, since it is larger than the sum of its proper divisors (126038595824).

252077191642 is a wasteful number, since it uses less digits than its factorization.

252077191642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126038595823.

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 252077191642 in words is "two hundred fifty-two billion, seventy-seven million, one hundred ninety-one thousand, six hundred forty-two".