61648031 has 8 divisors (see below), whose sum is σ = 63686784. Its totient is φ = 59628960.

The previous prime is 61648019. The next prime is 61648033. The reversal of 61648031 is 13084616.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61648031 is a prime.

It is a super-2 number, since 2×61648031² = 7600959452353922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61647985 and 61648003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61648033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1586 + ... + 11216.

It is an arithmetic number, because the mean of its divisors is an integer number (7960848).

Almost surely, 2^61648031 is an apocalyptic number.

61648031 is a deficient number, since it is larger than the sum of its proper divisors (2038753).

61648031 is a wasteful number, since it uses less digits than its factorization.

61648031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9841.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 61648031 is about 7851.6260099421. The cubic root of 61648031 is about 395.0387848473.

The spelling of 61648031 in words is "sixty-one million, six hundred forty-eight thousand, thirty-one".