61785007231 has 8 divisors (see below), whose sum is σ = 62929008000. Its totient is φ = 60645236640.

The previous prime is 61785007127. The next prime is 61785007243. The reversal of 61785007231 is 13270058716.

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 61785007231 - 2²³ = 61776618623 is a prime.

It is a super-2 number, since 2×61785007231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61785007831) 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, 1028056 + ... + 1086493.

It is an arithmetic number, because the mean of its divisors is an integer number (7866126000).

Almost surely, 2^61785007231 is an apocalyptic number.

61785007231 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

61785007231 is a deficient number, since it is larger than the sum of its proper divisors (1144000769).

61785007231 is a wasteful number, since it uses less digits than its factorization.

61785007231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2115089.

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 61785007231 in words is "sixty-one billion, seven hundred eighty-five million, seven thousand, two hundred thirty-one".