1025507265549 has 16 divisors (see below), whose sum is σ = 1559142268992. Its totient is φ = 593958958848.

The previous prime is 1025507265539. The next prime is 1025507265589. The reversal of 1025507265549 is 9455627055201.

It is a happy number.

It is not a de Polignac number, because 1025507265549 - 2¹⁹ = 1025506741261 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025507265539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 773383399 + ... + 773384724.

It is an arithmetic number, because the mean of its divisors is an integer number (97446391812).

Almost surely, 2^{1025507265549} is an apocalyptic number.

It is an amenable number.

1025507265549 is a deficient number, since it is larger than the sum of its proper divisors (533635003443).

1025507265549 is a wasteful number, since it uses less digits than its factorization.

1025507265549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546768156.

The product of its (nonzero) digits is 3780000, while the sum is 51.

The spelling of 1025507265549 in words is "one trillion, twenty-five billion, five hundred seven million, two hundred sixty-five thousand, five hundred forty-nine".