61654451 has 4 divisors (see below), whose sum is σ = 61675152. Its totient is φ = 61633752.

The previous prime is 61654409. The next prime is 61654501. The reversal of 61654451 is 15445616.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61654451 is a prime.

It is a super-2 number, since 2×61654451² = 7602542656222802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61654751) 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, 4940 + ... + 12153.

It is an arithmetic number, because the mean of its divisors is an integer number (15418788).

Almost surely, 2^61654451 is an apocalyptic number.

61654451 is a deficient number, since it is larger than the sum of its proper divisors (20701).

61654451 is a wasteful number, since it uses less digits than its factorization.

61654451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20700.

The product of its digits is 14400, while the sum is 32.

The square root of 61654451 is about 7852.0348318127. The cubic root of 61654451 is about 395.0524974289.

The spelling of 61654451 in words is "sixty-one million, six hundred fifty-four thousand, four hundred fifty-one".