61689501 has 24 divisors (see below), whose sum is σ = 90810720. Its totient is φ = 40347936.

The previous prime is 61689499. The next prime is 61689527. The reversal of 61689501 is 10598616.

61689501 = T₁₈₄ + T₁₈₅ + ... + T₇₂₁.

It is not a de Polignac number, because 61689501 - 2¹ = 61689499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61689571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 200790 + ... + 201096.

It is an arithmetic number, because the mean of its divisors is an integer number (3783780).

Almost surely, 2^61689501 is an apocalyptic number.

It is an amenable number.

61689501 is a deficient number, since it is larger than the sum of its proper divisors (29121219).

61689501 is a wasteful number, since it uses less digits than its factorization.

61689501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665 (or 662 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 61689501 is about 7854.2664202330. The cubic root of 61689501 is about 395.1273445094.

The spelling of 61689501 in words is "sixty-one million, six hundred eighty-nine thousand, five hundred one".