61368751 has 4 divisors (see below), whose sum is σ = 61398400. Its totient is φ = 61339104.

The previous prime is 61368743. The next prime is 61368757. The reversal of 61368751 is 15786316.

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 61368751 - 2³ = 61368743 is a prime.

It is a super-2 number, since 2×61368751² = 7532247198600002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61368751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61368757) 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, 11466 + ... + 15943.

It is an arithmetic number, because the mean of its divisors is an integer number (15349600).

Almost surely, 2^61368751 is an apocalyptic number.

61368751 is a deficient number, since it is larger than the sum of its proper divisors (29649).

61368751 is a wasteful number, since it uses less digits than its factorization.

61368751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29648.

The product of its digits is 30240, while the sum is 37.

The square root of 61368751 is about 7833.8209706375. The cubic root of 61368751 is about 394.4413423871.

The spelling of 61368751 in words is "sixty-one million, three hundred sixty-eight thousand, seven hundred fifty-one".