61616632453 has 4 divisors (see below), whose sum is σ = 61626636448. Its totient is φ = 61606628460.

The previous prime is 61616632433. The next prime is 61616632501. The reversal of 61616632453 is 35423661616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61616632453 - 2²⁹ = 61079761541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61616632433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4992753 + ... + 5005078.

It is an arithmetic number, because the mean of its divisors is an integer number (15406659112).

Almost surely, 2^61616632453 is an apocalyptic number.

It is an amenable number.

61616632453 is a deficient number, since it is larger than the sum of its proper divisors (10003995).

61616632453 is an equidigital number, since it uses as much as digits as its factorization.

61616632453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10003994.

The product of its digits is 466560, while the sum is 43.

The spelling of 61616632453 in words is "sixty-one billion, six hundred sixteen million, six hundred thirty-two thousand, four hundred fifty-three".