1025540161591 has 8 divisors (see below), whose sum is σ = 1118788038144. Its totient is φ = 932295110520.

The previous prime is 1025540161577. The next prime is 1025540161609. The reversal of 1025540161591 is 1951610455201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1025540161591 - 2¹³ = 1025540153399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025540168591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91770 + ... + 1435096.

It is an arithmetic number, because the mean of its divisors is an integer number (139848504768).

Almost surely, 2^{1025540161591} is an apocalyptic number.

1025540161591 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1025540161591 is a deficient number, since it is larger than the sum of its proper divisors (93247876553).

1025540161591 is a wasteful number, since it uses less digits than its factorization.

1025540161591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412741.

The product of its (nonzero) digits is 54000, while the sum is 40.

The spelling of 1025540161591 in words is "one trillion, twenty-five billion, five hundred forty million, one hundred sixty-one thousand, five hundred ninety-one".