61467240247 has 4 divisors (see below), whose sum is σ = 70248274576. Its totient is φ = 52686205920.

The previous prime is 61467240239. The next prime is 61467240251. The reversal of 61467240247 is 74204276416.

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 61467240247 - 2³ = 61467240239 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 (61467540247) 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, 4390517154 + ... + 4390517167.

It is an arithmetic number, because the mean of its divisors is an integer number (17562068644).

Almost surely, 2^61467240247 is an apocalyptic number.

61467240247 is a deficient number, since it is larger than the sum of its proper divisors (8781034329).

61467240247 is an equidigital number, since it uses as much as digits as its factorization.

61467240247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8781034328.

The product of its (nonzero) digits is 451584, while the sum is 43.

The spelling of 61467240247 in words is "sixty-one billion, four hundred sixty-seven million, two hundred forty thousand, two hundred forty-seven".