1260215356551 has 32 divisors (see below), whose sum is σ = 1776538871040. Its totient is φ = 792413466624.

The previous prime is 1260215356549. The next prime is 1260215356577. The reversal of 1260215356551 is 1556535120621.

It is a happy number.

It is not a de Polignac number, because 1260215356551 - 2¹ = 1260215356549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1260215356151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18565165 + ... + 18632921.

It is an arithmetic number, because the mean of its divisors is an integer number (55516839720).

Almost surely, 2^{1260215356551} is an apocalyptic number.

1260215356551 is a deficient number, since it is larger than the sum of its proper divisors (516323514489).

1260215356551 is a wasteful number, since it uses less digits than its factorization.

1260215356551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69215.

The product of its (nonzero) digits is 270000, while the sum is 42.

The spelling of 1260215356551 in words is "one trillion, two hundred sixty billion, two hundred fifteen million, three hundred fifty-six thousand, five hundred fifty-one".