1491156122896 has 40 divisors (see below), whose sum is σ = 3253431552768. Its totient is φ = 655933776000.

The previous prime is 1491156122881. The next prime is 1491156122941. The reversal of 1491156122896 is 6982216511941.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136647415 + ... + 136658326.

Almost surely, 2^{1491156122896} is an apocalyptic number.

1491156122896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1491156122896 is an abundant number, since it is smaller than the sum of its proper divisors (1762275429872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1491156122896 is a wasteful number, since it uses less digits than its factorization.

1491156122896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273305791 (or 273305785 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 55.

The spelling of 1491156122896 in words is "one trillion, four hundred ninety-one billion, one hundred fifty-six million, one hundred twenty-two thousand, eight hundred ninety-six".