1491557964105 has 96 divisors (see below), whose sum is σ = 2709686701440. Its totient is φ = 693999201280.

The previous prime is 1491557964101. The next prime is 1491557964121. The reversal of 1491557964105 is 5014697551941.

It is not a de Polignac number, because 1491557964105 - 2² = 1491557964101 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1491557964101) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 133443277 + ... + 133454453.

It is an arithmetic number, because the mean of its divisors is an integer number (28225903140).

Almost surely, 2^{1491557964105} is an apocalyptic number.

1491557964105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1491557964105 is a deficient number, since it is larger than the sum of its proper divisors (1218128737335).

1491557964105 is a wasteful number, since it uses less digits than its factorization.

1491557964105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11559 (or 11392 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 57.

The spelling of 1491557964105 in words is "one trillion, four hundred ninety-one billion, five hundred fifty-seven million, nine hundred sixty-four thousand, one hundred five".