1288870779501 has 6 divisors (see below), whose sum is σ = 1861702237070. Its totient is φ = 859247186328.

The previous prime is 1288870779487. The next prime is 1288870779503. The reversal of 1288870779501 is 1059770788821.

It can be written as a sum of positive squares in only one way, i.e., 1018393814025 + 270476965476 = 1009155^2 + 520074^2 .

It is not a de Polignac number, because 1288870779501 - 2⁹ = 1288870778989 is a prime.

It is a super-2 number, since 2×1288870779501² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288870779503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71603932186 + ... + 71603932203.

Almost surely, 2^{1288870779501} is an apocalyptic number.

It is an amenable number.

1288870779501 is a deficient number, since it is larger than the sum of its proper divisors (572831457569).

1288870779501 is a wasteful number, since it uses less digits than its factorization.

1288870779501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143207864395 (or 143207864392 counting only the distinct ones).

The product of its (nonzero) digits is 15805440, while the sum is 63.

The spelling of 1288870779501 in words is "one trillion, two hundred eighty-eight billion, eight hundred seventy million, seven hundred seventy-nine thousand, five hundred one".