61257440395 has 8 divisors (see below), whose sum is σ = 73510300656. Its totient is φ = 49005037536.

The previous prime is 61257440347. The next prime is 61257440473. The reversal of 61257440395 is 59304475216.

It is a happy number.

61257440395 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 61257440395 - 2⁹ = 61257439883 is a prime.

It is a Duffinian 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, 356689 + ... + 499741.

It is an arithmetic number, because the mean of its divisors is an integer number (9188787582).

Almost surely, 2^61257440395 is an apocalyptic number.

61257440395 is a deficient number, since it is larger than the sum of its proper divisors (12252860261).

61257440395 is a wasteful number, since it uses less digits than its factorization.

61257440395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228701.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 61257440395 in words is "sixty-one billion, two hundred fifty-seven million, four hundred forty thousand, three hundred ninety-five".