61366200256631 has 8 divisors (see below), whose sum is σ = 61373487937584. Its totient is φ = 61358912919360.

The previous prime is 61366200256601. The next prime is 61366200256639. The reversal of 61366200256631 is 13665200266316.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61366200256631 is a prime.

It is a super-2 number, since 2×61366200256631² (a number of 28 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 (61366200256639) 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, 551119595 + ... + 551230931.

It is an arithmetic number, because the mean of its divisors is an integer number (7671685992198).

Almost surely, 2^{61366200256631} is an apocalyptic number.

61366200256631 is a deficient number, since it is larger than the sum of its proper divisors (7287680953).

61366200256631 is a wasteful number, since it uses less digits than its factorization.

61366200256631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171841.

The product of its (nonzero) digits is 1399680, while the sum is 47.

The spelling of 61366200256631 in words is "sixty-one trillion, three hundred sixty-six billion, two hundred million, two hundred fifty-six thousand, six hundred thirty-one".