61745807903 has 32 divisors (see below), whose sum is σ = 71066688000. Its totient is φ = 53246906496.

The previous prime is 61745807891. The next prime is 61745807911. The reversal of 61745807903 is 30970854716.

It is a cyclic number.

It is not a de Polignac number, because 61745807903 - 2⁴ = 61745807887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61745807923) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1194998 + ... + 1245596.

It is an arithmetic number, because the mean of its divisors is an integer number (2220834000).

Almost surely, 2^61745807903 is an apocalyptic number.

61745807903 is a deficient number, since it is larger than the sum of its proper divisors (9320880097).

61745807903 is a wasteful number, since it uses less digits than its factorization.

61745807903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50751.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 61745807903 in words is "sixty-one billion, seven hundred forty-five million, eight hundred seven thousand, nine hundred three".