65261049903 has 24 divisors (see below), whose sum is σ = 107754835968. Its totient is φ = 37284306192.

The previous prime is 65261049871. The next prime is 65261049949. The reversal of 65261049903 is 30994016256.

It is not a de Polignac number, because 65261049903 - 2⁵ = 65261049871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65261049703) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 206626 + ... + 416192.

It is an arithmetic number, because the mean of its divisors is an integer number (4489784832).

Almost surely, 2^65261049903 is an apocalyptic number.

65261049903 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

65261049903 is a deficient number, since it is larger than the sum of its proper divisors (42493786065).

65261049903 is a wasteful number, since it uses less digits than its factorization.

65261049903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214523 (or 214520 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 65261049903 in words is "sixty-five billion, two hundred sixty-one million, forty-nine thousand, nine hundred three".