1261552535464 has 64 divisors (see below), whose sum is σ = 2616596897040. Its totient is φ = 566435358720.

The previous prime is 1261552535381. The next prime is 1261552535483. The reversal of 1261552535464 is 4645352551621.

It can be written as a sum of positive squares in 8 ways, for example, as 567246972964 + 694305562500 = 753158^2 + 833250^2 .

It is a super-3 number, since 3×1261552535464³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31660674 + ... + 31700494.

Almost surely, 2^{1261552535464} is an apocalyptic number.

It is an amenable number.

1261552535464 is an abundant number, since it is smaller than the sum of its proper divisors (1355044361576).

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

1261552535464 is a wasteful number, since it uses less digits than its factorization.

1261552535464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48110 (or 48106 counting only the distinct ones).

The product of its digits is 4320000, while the sum is 49.

The spelling of 1261552535464 in words is "one trillion, two hundred sixty-one billion, five hundred fifty-two million, five hundred thirty-five thousand, four hundred sixty-four".