61533764 has 6 divisors (see below), whose sum is σ = 107684094. Its totient is φ = 30766880.

The previous prime is 61533757. The next prime is 61533779. The reversal of 61533764 is 46733516.

It can be written as a sum of positive squares in only one way, i.e., 55383364 + 6150400 = 7442^2 + 2480^2 .

It is a super-3 number, since 3×61533764³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7691717 + ... + 7691724.

It is an arithmetic number, because the mean of its divisors is an integer number (17947349).

Almost surely, 2^61533764 is an apocalyptic number.

It is an amenable number.

61533764 is a deficient number, since it is larger than the sum of its proper divisors (46150330).

61533764 is a wasteful number, since it uses less digits than its factorization.

61533764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15383445 (or 15383443 counting only the distinct ones).

The product of its digits is 45360, while the sum is 35.

The square root of 61533764 is about 7844.3459893098. The cubic root of 61533764 is about 394.7945606909.

The spelling of 61533764 in words is "sixty-one million, five hundred thirty-three thousand, seven hundred sixty-four".