61532555446451 has 4 divisors (see below), whose sum is σ = 61543990604304. Its totient is φ = 61521120288600.

The previous prime is 61532555446379. The next prime is 61532555446469. The reversal of 61532555446451 is 15464455523516.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61532555446451 - 2¹⁴ = 61532555430067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61532555446471) 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, 5717570855 + ... + 5717581616.

It is an arithmetic number, because the mean of its divisors is an integer number (15385997651076).

Almost surely, 2^{61532555446451} is an apocalyptic number.

61532555446451 is a deficient number, since it is larger than the sum of its proper divisors (11435157853).

61532555446451 is a wasteful number, since it uses less digits than its factorization.

61532555446451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11435157852.

The product of its digits is 43200000, while the sum is 56.

The spelling of 61532555446451 in words is "sixty-one trillion, five hundred thirty-two billion, five hundred fifty-five million, four hundred forty-six thousand, four hundred fifty-one".