1012191457646 has 8 divisors (see below), whose sum is σ = 1518343130520. Its totient is φ = 506077080808.

The previous prime is 1012191457567. The next prime is 1012191457679. The reversal of 1012191457646 is 6467541912101.

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

It is a super-2 number, since 2×1012191457646² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1012191457646.

It is a congruent number.

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, 9256061 + ... + 9364776.

It is an arithmetic number, because the mean of its divisors is an integer number (189792891315).

Almost surely, 2^{1012191457646} is an apocalyptic number.

1012191457646 is a deficient number, since it is larger than the sum of its proper divisors (506151672874).

1012191457646 is a wasteful number, since it uses less digits than its factorization.

1012191457646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18648018.

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 1012191457646 in words is "one trillion, twelve billion, one hundred ninety-one million, four hundred fifty-seven thousand, six hundred forty-six".