61811995 has 8 divisors (see below), whose sum is σ = 84770784. Its totient is φ = 42385344.

The previous prime is 61811977. The next prime is 61812007. The reversal of 61811995 is 59911816.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61811995 - 2²⁵ = 28257563 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 882994 + ... + 883063.

It is an arithmetic number, because the mean of its divisors is an integer number (10596348).

Almost surely, 2^61811995 is an apocalyptic number.

61811995 is a deficient number, since it is larger than the sum of its proper divisors (22958789).

61811995 is a wasteful number, since it uses less digits than its factorization.

61811995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766069.

The product of its digits is 19440, while the sum is 40.

The square root of 61811995 is about 7862.0604805611. The cubic root of 61811995 is about 395.3887003195.

The spelling of 61811995 in words is "sixty-one million, eight hundred eleven thousand, nine hundred ninety-five".