1091799401615 has 32 divisors (see below), whose sum is σ = 1417322188800. Its totient is φ = 802610173440.

The previous prime is 1091799401611. The next prime is 1091799401629. The reversal of 1091799401615 is 5161049971901.

1091799401615 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1091799401615 - 2² = 1091799401611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091799401611) 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, 22338905 + ... + 22387725.

It is an arithmetic number, because the mean of its divisors is an integer number (44291318400).

Almost surely, 2^{1091799401615} is an apocalyptic number.

1091799401615 is a deficient number, since it is larger than the sum of its proper divisors (325522787185).

1091799401615 is a wasteful number, since it uses less digits than its factorization.

1091799401615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50387.

The product of its (nonzero) digits is 612360, while the sum is 53.

The spelling of 1091799401615 in words is "one trillion, ninety-one billion, seven hundred ninety-nine million, four hundred one thousand, six hundred fifteen".