61251103410503 has 4 divisors (see below), whose sum is σ = 61253069958600. Its totient is φ = 61249136862408.

The previous prime is 61251103410499. The next prime is 61251103410509. The reversal of 61251103410503 is 30501430115216.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61251103410503 - 2² = 61251103410499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61251103410503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61251103410509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 983227328 + ... + 983289621.

It is an arithmetic number, because the mean of its divisors is an integer number (15313267489650).

Almost surely, 2^{61251103410503} is an apocalyptic number.

61251103410503 is a deficient number, since it is larger than the sum of its proper divisors (1966548097).

61251103410503 is a wasteful number, since it uses less digits than its factorization.

61251103410503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966548096.

The product of its (nonzero) digits is 10800, while the sum is 32.

Adding to 61251103410503 its reverse (30501430115216), we get a palindrome (91752533525719).

The spelling of 61251103410503 in words is "sixty-one trillion, two hundred fifty-one billion, one hundred three million, four hundred ten thousand, five hundred three".