61516453 has 8 divisors (see below), whose sum is σ = 63756000. Its totient is φ = 59284848.

The previous prime is 61516447. The next prime is 61516501. The reversal of 61516453 is 35461516.

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 61516453 - 2²⁵ = 27962021 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61516423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16998 + ... + 20296.

It is an arithmetic number, because the mean of its divisors is an integer number (7969500).

Almost surely, 2^61516453 is an apocalyptic number.

It is an amenable number.

61516453 is a deficient number, since it is larger than the sum of its proper divisors (2239547).

61516453 is a wasteful number, since it uses less digits than its factorization.

61516453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3971.

The product of its digits is 10800, while the sum is 31.

The square root of 61516453 is about 7843.2425054948. The cubic root of 61516453 is about 394.7575353291.

Adding to 61516453 its reverse (35461516), we get a palindrome (96977969).

The spelling of 61516453 in words is "sixty-one million, five hundred sixteen thousand, four hundred fifty-three".