61859638 has 4 divisors (see below), whose sum is σ = 92789460. Its totient is φ = 30929818.

The previous prime is 61859591. The next prime is 61859647. The reversal of 61859638 is 83695816.

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

It is a super-2 number, since 2×61859638² = 7653229626982088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15464908 + ... + 15464911.

It is an arithmetic number, because the mean of its divisors is an integer number (23197365).

Almost surely, 2^61859638 is an apocalyptic number.

61859638 is a deficient number, since it is larger than the sum of its proper divisors (30929822).

61859638 is a wasteful number, since it uses less digits than its factorization.

61859638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30929821.

The product of its digits is 311040, while the sum is 46.

The square root of 61859638 is about 7865.0898278405. The cubic root of 61859638 is about 395.4902591734.

The spelling of 61859638 in words is "sixty-one million, eight hundred fifty-nine thousand, six hundred thirty-eight".