61391754 has 24 divisors (see below), whose sum is σ = 133201380. Its totient is φ = 20435328.

The previous prime is 61391747. The next prime is 61391789. The reversal of 61391754 is 45719316.

It can be written as a sum of positive squares in 2 ways, for example, as 55845729 + 5546025 = 7473^2 + 2355^2 .

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13842 + ... + 17730.

Almost surely, 2^61391754 is an apocalyptic number.

61391754 is an abundant number, since it is smaller than the sum of its proper divisors (71809626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61391754 is a wasteful number, since it uses less digits than its factorization.

61391754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4774 (or 4771 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 61391754 is about 7835.2890182813. The cubic root of 61391754 is about 394.4906193705.

The spelling of 61391754 in words is "sixty-one million, three hundred ninety-one thousand, seven hundred fifty-four".