61712551 has 16 divisors (see below), whose sum is σ = 68659200. Its totient is φ = 55224288.

The previous prime is 61712531. The next prime is 61712569. The reversal of 61712551 is 15521716.

It is a cyclic number.

It is not a de Polignac number, because 61712551 - 2⁷ = 61712423 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 (61712501) 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, 24706 + ... + 27088.

It is an arithmetic number, because the mean of its divisors is an integer number (4291200).

Almost surely, 2^61712551 is an apocalyptic number.

61712551 is a deficient number, since it is larger than the sum of its proper divisors (6946649).

61712551 is a wasteful number, since it uses less digits than its factorization.

61712551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2478.

The product of its digits is 2100, while the sum is 28.

The square root of 61712551 is about 7855.7336385598. The cubic root of 61712551 is about 395.1765508899.

The spelling of 61712551 in words is "sixty-one million, seven hundred twelve thousand, five hundred fifty-one".