61529801 has 4 divisors (see below), whose sum is σ = 61670400. Its totient is φ = 61389204.

The previous prime is 61529789. The next prime is 61529803. The reversal of 61529801 is 10892516.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61529801 - 2¹⁰ = 61528777 is a prime.

It is a super-2 number, since 2×61529801² = 7571832822199202, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61529803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69641 + ... + 70518.

It is an arithmetic number, because the mean of its divisors is an integer number (15417600).

Almost surely, 2^61529801 is an apocalyptic number.

It is an amenable number.

61529801 is a deficient number, since it is larger than the sum of its proper divisors (140599).

61529801 is a wasteful number, since it uses less digits than its factorization.

61529801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140598.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 61529801 is about 7844.0933829220. The cubic root of 61529801 is about 394.7860851032.

The spelling of 61529801 in words is "sixty-one million, five hundred twenty-nine thousand, eight hundred one".