61328637 has 16 divisors (see below), whose sum is σ = 95640000. Its totient is φ = 38733552.

The previous prime is 61328623. The next prime is 61328669. The reversal of 61328637 is 73682316.

It is a happy number.

61328637 is a `hidden beast` number, since 6 + 13 + 2 + 8 + 637 = 666.

It is not a de Polignac number, because 61328637 - 2¹⁰ = 61327613 is a prime.

It is a super-2 number, since 2×61328637² = 7522403432555538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61328677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59262 + ... + 60287.

It is an arithmetic number, because the mean of its divisors is an integer number (5977500).

Almost surely, 2^61328637 is an apocalyptic number.

It is an amenable number.

61328637 is a deficient number, since it is larger than the sum of its proper divisors (34311363).

61328637 is a wasteful number, since it uses less digits than its factorization.

61328637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119577 (or 119571 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 61328637 is about 7831.2602434091. The cubic root of 61328637 is about 394.3553807833.

The spelling of 61328637 in words is "sixty-one million, three hundred twenty-eight thousand, six hundred thirty-seven".