61400553 has 16 divisors (see below), whose sum is σ = 86109696. Its totient is φ = 38862720.

The previous prime is 61400543. The next prime is 61400557. The reversal of 61400553 is 35500416.

It is not a de Polignac number, because 61400553 - 2¹⁶ = 61335017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61400557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1300 + ... + 11157.

It is an arithmetic number, because the mean of its divisors is an integer number (5381856).

Almost surely, 2^61400553 is an apocalyptic number.

It is an amenable number.

61400553 is a deficient number, since it is larger than the sum of its proper divisors (24709143).

61400553 is a wasteful number, since it uses less digits than its factorization.

61400553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12544.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 61400553 is about 7835.8504962767. The cubic root of 61400553 is about 394.5094653170.

Adding to 61400553 its reverse (35500416), we get a palindrome (96900969).

The spelling of 61400553 in words is "sixty-one million, four hundred thousand, five hundred fifty-three".