61696857 has 16 divisors (see below), whose sum is σ = 86784320. Its totient is φ = 38880000.

The previous prime is 61696837. The next prime is 61696909. The reversal of 61696857 is 75869616.

It is not a de Polignac number, because 61696857 - 2⁶ = 61696793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61696807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33357 + ... + 35157.

It is an arithmetic number, because the mean of its divisors is an integer number (5424020).

Almost surely, 2^61696857 is an apocalyptic number.

It is an amenable number.

61696857 is a deficient number, since it is larger than the sum of its proper divisors (25087463).

61696857 is a wasteful number, since it uses less digits than its factorization.

61696857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424.

The product of its digits is 544320, while the sum is 48.

The square root of 61696857 is about 7854.7346867988. The cubic root of 61696857 is about 395.1430491873.

The spelling of 61696857 in words is "sixty-one million, six hundred ninety-six thousand, eight hundred fifty-seven".