261251062025 has 12 divisors (see below), whose sum is σ = 323960616384. Its totient is φ = 208994850000.

The previous prime is 261251061943. The next prime is 261251062049. The reversal of 261251062025 is 520260152162.

It is not a de Polignac number, because 261251062025 - 2¹² = 261251057929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261251061982 and 261251062000.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 875900 + ... + 1135650.

It is an arithmetic number, because the mean of its divisors is an integer number (26996718032).

Almost surely, 2^261251062025 is an apocalyptic number.

261251062025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

261251062025 is a deficient number, since it is larger than the sum of its proper divisors (62709554359).

261251062025 is a wasteful number, since it uses less digits than its factorization.

261251062025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299992 (or 299987 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 261251062025 in words is "two hundred sixty-one billion, two hundred fifty-one million, sixty-two thousand, twenty-five".