1355126151561 has 64 divisors (see below), whose sum is σ = 2355326926848. Its totient is φ = 672539931648.

The previous prime is 1355126151557. The next prime is 1355126151583. The reversal of 1355126151561 is 1651516215531.

It is a happy number.

It is not a de Polignac number, because 1355126151561 - 2² = 1355126151557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1355126151161) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15769036 + ... + 15854738.

It is an arithmetic number, because the mean of its divisors is an integer number (36801983232).

Almost surely, 2^{1355126151561} is an apocalyptic number.

It is an amenable number.

1355126151561 is a deficient number, since it is larger than the sum of its proper divisors (1000200775287).

1355126151561 is a wasteful number, since it uses less digits than its factorization.

1355126151561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89150.

The product of its digits is 135000, while the sum is 42.

The spelling of 1355126151561 in words is "one trillion, three hundred fifty-five billion, one hundred twenty-six million, one hundred fifty-one thousand, five hundred sixty-one".