61261651 has 16 divisors (see below), whose sum is σ = 68583168. Its totient is φ = 54252000.

The previous prime is 61261649. The next prime is 61261661. The reversal of 61261651 is 15616216.

It is not a de Polignac number, because 61261651 - 2¹ = 61261649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61261621) 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, 74026 + ... + 74848.

It is an arithmetic number, because the mean of its divisors is an integer number (4286448).

Almost surely, 2^61261651 is an apocalyptic number.

61261651 is a deficient number, since it is larger than the sum of its proper divisors (7321517).

61261651 is a wasteful number, since it uses less digits than its factorization.

61261651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002.

The product of its digits is 2160, while the sum is 28.

The square root of 61261651 is about 7826.9822409406. The cubic root of 61261651 is about 394.2117506926.

Adding to 61261651 its reverse (15616216), we get a palindrome (76877867).

It can be divided in two parts, 6126 and 1651, that added together give a palindrome (7777).

The spelling of 61261651 in words is "sixty-one million, two hundred sixty-one thousand, six hundred fifty-one".