61400818953 has 6 divisors (see below), whose sum is σ = 88690071834. Its totient is φ = 40933879296.

The previous prime is 61400818939. The next prime is 61400818981. The reversal of 61400818953 is 35981800416.

61400818953 is a `hidden beast` number, since 61 + 400 + 8 + 189 + 5 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 49656328569 + 11744490384 = 222837^2 + 108372^2 .

It is not a de Polignac number, because 61400818953 - 2⁹ = 61400818441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61400818899 and 61400818908.

It is not an unprimeable number, because it can be changed into a prime (61400818993) 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, 3411156600 + ... + 3411156617.

It is an arithmetic number, because the mean of its divisors is an integer number (14781678639).

Almost surely, 2^61400818953 is an apocalyptic number.

It is an amenable number.

61400818953 is a deficient number, since it is larger than the sum of its proper divisors (27289252881).

61400818953 is a wasteful number, since it uses less digits than its factorization.

61400818953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6822313223 (or 6822313220 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 61400818953 in words is "sixty-one billion, four hundred million, eight hundred eighteen thousand, nine hundred fifty-three".