61072668381 has 8 divisors (see below), whose sum is σ = 81440753184. Its totient is φ = 40709847920.

The previous prime is 61072668343. The next prime is 61072668389. The reversal of 61072668381 is 18386627016.

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 61072668381 - 2¹⁸ = 61072406237 is a prime.

It is a super-2 number, since 2×61072668381² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61072668381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61072668389) 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, 1288935 + ... + 1335476.

It is an arithmetic number, because the mean of its divisors is an integer number (10180094148).

Almost surely, 2^61072668381 is an apocalyptic number.

It is an amenable number.

61072668381 is a deficient number, since it is larger than the sum of its proper divisors (20368084803).

61072668381 is a wasteful number, since it uses less digits than its factorization.

61072668381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2632171.

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 61072668381 in words is "sixty-one billion, seventy-two million, six hundred sixty-eight thousand, three hundred eighty-one".