1261552535463 has 16 divisors (see below), whose sum is σ = 1853153684352. Its totient is φ = 757007220000.

The previous prime is 1261552535381. The next prime is 1261552535483. The reversal of 1261552535463 is 3645352551621.

It is not a de Polignac number, because 1261552535463 - 2¹⁷ = 1261552404391 is a prime.

It is a super-3 number, since 3×1261552535463³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261552535483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189248473 + ... + 189255138.

It is an arithmetic number, because the mean of its divisors is an integer number (115822105272).

Almost surely, 2^{1261552535463} is an apocalyptic number.

1261552535463 is a deficient number, since it is larger than the sum of its proper divisors (591601148889).

1261552535463 is a wasteful number, since it uses less digits than its factorization.

1261552535463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378503726.

The product of its digits is 3240000, while the sum is 48.

The spelling of 1261552535463 in words is "one trillion, two hundred sixty-one billion, five hundred fifty-two million, five hundred thirty-five thousand, four hundred sixty-three".