61863125645 has 8 divisors (see below), whose sum is σ = 77463392256. Its totient is φ = 47338739536.

The previous prime is 61863125633. The next prime is 61863125683. The reversal of 61863125645 is 54652136816.

61863125645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61863125645 - 2²⁴ = 61846348429 is a prime.

It is a super-3 number, since 3×61863125645³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61863125645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268969997 + ... + 268970226.

It is an arithmetic number, because the mean of its divisors is an integer number (9682924032).

Almost surely, 2^61863125645 is an apocalyptic number.

It is an amenable number.

61863125645 is a deficient number, since it is larger than the sum of its proper divisors (15600266611).

61863125645 is a wasteful number, since it uses less digits than its factorization.

61863125645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537940251.

The product of its digits is 1036800, while the sum is 47.

The spelling of 61863125645 in words is "sixty-one billion, eight hundred sixty-three million, one hundred twenty-five thousand, six hundred forty-five".