61140374465 has 8 divisors (see below), whose sum is σ = 73748597928. Its totient is φ = 48658867200.

The previous prime is 61140374459. The next prime is 61140374549. The reversal of 61140374465 is 56447304116.

It can be written as a sum of positive squares in 4 ways, for example, as 3082026256 + 58058348209 = 55516^2 + 240953^2 .

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

It is not a de Polignac number, because 61140374465 - 2⁸ = 61140374209 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, 31677986 + ... + 31679915.

It is an arithmetic number, because the mean of its divisors is an integer number (9218574741).

Almost surely, 2^61140374465 is an apocalyptic number.

It is an amenable number.

61140374465 is a deficient number, since it is larger than the sum of its proper divisors (12608223463).

61140374465 is a wasteful number, since it uses less digits than its factorization.

61140374465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63358099.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 61140374465 in words is "sixty-one billion, one hundred forty million, three hundred seventy-four thousand, four hundred sixty-five".