61523764 has 6 divisors (see below), whose sum is σ = 107666594. Its totient is φ = 30761880.

The previous prime is 61523741. The next prime is 61523771. The reversal of 61523764 is 46732516.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 46376100 + 15147664 = 6810^2 + 3892^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7690467 + ... + 7690474.

Almost surely, 2^61523764 is an apocalyptic number.

It is an amenable number.

61523764 is a deficient number, since it is larger than the sum of its proper divisors (46142830).

61523764 is a wasteful number, since it uses less digits than its factorization.

61523764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15380945 (or 15380943 counting only the distinct ones).

The product of its digits is 30240, while the sum is 34.

The square root of 61523764 is about 7843.7085616435. The cubic root of 61523764 is about 394.7731731944.

The spelling of 61523764 in words is "sixty-one million, five hundred twenty-three thousand, seven hundred sixty-four".