61819874 has 8 divisors (see below), whose sum is σ = 93115308. Its totient is φ = 30781440.

The previous prime is 61819873. The next prime is 61819907. The reversal of 61819874 is 47891816.

It can be written as a sum of positive squares in 2 ways, for example, as 51739249 + 10080625 = 7193^2 + 3175^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (61819873) 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, 63647 + ... + 64610.

Almost surely, 2^61819874 is an apocalyptic number.

61819874 is a deficient number, since it is larger than the sum of its proper divisors (31295434).

61819874 is a wasteful number, since it uses less digits than its factorization.

61819874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128500.

The product of its digits is 96768, while the sum is 44.

The square root of 61819874 is about 7862.5615418895. The cubic root of 61819874 is about 395.4054992985.

The spelling of 61819874 in words is "sixty-one million, eight hundred nineteen thousand, eight hundred seventy-four".