1261628532495 has 96 divisors (see below), whose sum is σ = 2374287552000. Its totient is φ = 641837395584.

The previous prime is 1261628532487. The next prime is 1261628532497. The reversal of 1261628532495 is 5942358261621.

1261628532495 is a `hidden beast` number, since 1 + 2 + 6 + 1 + 62 + 8 + 532 + 49 + 5 = 666.

It is not a de Polignac number, because 1261628532495 - 2³ = 1261628532487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261628532497) 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, 2708806 + ... + 3140204.

It is an arithmetic number, because the mean of its divisors is an integer number (24732162000).

Almost surely, 2^{1261628532495} is an apocalyptic number.

1261628532495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1261628532495 is a deficient number, since it is larger than the sum of its proper divisors (1112659019505).

1261628532495 is an equidigital number, since it uses as much as digits as its factorization.

1261628532495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431531 (or 431519 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The spelling of 1261628532495 in words is "one trillion, two hundred sixty-one billion, six hundred twenty-eight million, five hundred thirty-two thousand, four hundred ninety-five".