61651005 has 32 divisors (see below), whose sum is σ = 106614144. Its totient is φ = 30241536.

The previous prime is 61650997. The next prime is 61651019. The reversal of 61651005 is 50015616.

It is not a de Polignac number, because 61651005 - 2³ = 61650997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90727 + ... + 91403.

It is an arithmetic number, because the mean of its divisors is an integer number (3331692).

Almost surely, 2^61651005 is an apocalyptic number.

61651005 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61651005 is a deficient number, since it is larger than the sum of its proper divisors (44963139).

61651005 is a wasteful number, since it uses less digits than its factorization.

61651005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 61651005 is about 7851.8153951809. The cubic root of 61651005 is about 395.0451371802.

The spelling of 61651005 in words is "sixty-one million, six hundred fifty-one thousand, five".