1025507265550 has 48 divisors (see below), whose sum is σ = 1912385233440. Its totient is φ = 409141362560.

The previous prime is 1025507265539. The next prime is 1025507265589. The reversal of 1025507265550 is 555627055201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1025507265497 and 1025507265506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36720192 + ... + 36748108.

It is an arithmetic number, because the mean of its divisors is an integer number (39841359030).

Almost surely, 2^{1025507265550} is an apocalyptic number.

1025507265550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1025507265550 is a deficient number, since it is larger than the sum of its proper divisors (886877967890).

1025507265550 is a wasteful number, since it uses less digits than its factorization.

1025507265550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29805 (or 29800 counting only the distinct ones).

The product of its (nonzero) digits is 525000, while the sum is 43.

The spelling of 1025507265550 in words is "one trillion, twenty-five billion, five hundred seven million, two hundred sixty-five thousand, five hundred fifty".