61545258397 has 8 divisors (see below), whose sum is σ = 71973192896. Its totient is φ = 51526262592.

The previous prime is 61545258343. The next prime is 61545258403. The reversal of 61545258397 is 79385254516.

61545258397 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 de Polignac number, because none of the positive numbers 2^k-61545258397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61545258097) 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, 102234348 + ... + 102234949.

It is an arithmetic number, because the mean of its divisors is an integer number (8996649112).

Almost surely, 2^61545258397 is an apocalyptic number.

It is an amenable number.

61545258397 is a deficient number, since it is larger than the sum of its proper divisors (10427934499).

61545258397 is a wasteful number, since it uses less digits than its factorization.

61545258397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204469347.

The product of its digits is 9072000, while the sum is 55.

The spelling of 61545258397 in words is "sixty-one billion, five hundred forty-five million, two hundred fifty-eight thousand, three hundred ninety-seven".