61558001 has 4 divisors (see below), whose sum is σ = 61803504. Its totient is φ = 61312500.

The previous prime is 61557997. The next prime is 61558027. The reversal of 61558001 is 10085516.

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 61558001 - 2² = 61557997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61558031) 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, 122375 + ... + 122876.

It is an arithmetic number, because the mean of its divisors is an integer number (15450876).

Almost surely, 2^61558001 is an apocalyptic number.

It is an amenable number.

61558001 is a deficient number, since it is larger than the sum of its proper divisors (245503).

61558001 is a wasteful number, since it uses less digits than its factorization.

61558001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245502.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 61558001 is about 7845.8907078801. The cubic root of 61558001 is about 394.8463879540.

The spelling of 61558001 in words is "sixty-one million, five hundred fifty-eight thousand, one".