61351894247 has 8 divisors (see below), whose sum is σ = 70118100000. Its totient is φ = 52586100864.

The previous prime is 61351894213. The next prime is 61351894259. The reversal of 61351894247 is 74249815316.

It is a happy number.

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 61351894247 - 2⁸ = 61351893991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61351894195 and 61351894204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61351896247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346379 + ... + 492627.

It is an arithmetic number, because the mean of its divisors is an integer number (8764762500).

Almost surely, 2^61351894247 is an apocalyptic number.

61351894247 is a deficient number, since it is larger than the sum of its proper divisors (8766205753).

61351894247 is a wasteful number, since it uses less digits than its factorization.

61351894247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206185.

The product of its digits is 1451520, while the sum is 50.

The spelling of 61351894247 in words is "sixty-one billion, three hundred fifty-one million, eight hundred ninety-four thousand, two hundred forty-seven".