61450419897 has 6 divisors (see below), whose sum is σ = 88761717642. Its totient is φ = 40966946592.

The previous prime is 61450419893. The next prime is 61450419923. The reversal of 61450419897 is 79891405416.

61450419897 is a `hidden beast` number, since 6 + 145 + 0 + 419 + 89 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 35701724601 + 25748695296 = 188949^2 + 160464^2 .

It is not a de Polignac number, because 61450419897 - 2² = 61450419893 is a prime.

It is a super-2 number, since 2×61450419897² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61450419893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3413912208 + ... + 3413912225.

It is an arithmetic number, because the mean of its divisors is an integer number (14793619607).

Almost surely, 2^61450419897 is an apocalyptic number.

It is an amenable number.

61450419897 is a deficient number, since it is larger than the sum of its proper divisors (27311297745).

61450419897 is a wasteful number, since it uses less digits than its factorization.

61450419897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6827824439 (or 6827824436 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 61450419897 in words is "sixty-one billion, four hundred fifty million, four hundred nineteen thousand, eight hundred ninety-seven".