61403442505 has 8 divisors (see below), whose sum is σ = 75397715712. Its totient is φ = 47980364208.

The previous prime is 61403442487. The next prime is 61403442511. The reversal of 61403442505 is 50524430416.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61403442505 - 2⁷ = 61403442377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142798489 + ... + 142798918.

It is an arithmetic number, because the mean of its divisors is an integer number (9424714464).

Almost surely, 2^61403442505 is an apocalyptic number.

It is an amenable number.

61403442505 is a deficient number, since it is larger than the sum of its proper divisors (13994273207).

61403442505 is a wasteful number, since it uses less digits than its factorization.

61403442505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285597455.

The product of its (nonzero) digits is 57600, while the sum is 34.

The spelling of 61403442505 in words is "sixty-one billion, four hundred three million, four hundred forty-two thousand, five hundred five".