61725643635 has 16 divisors (see below), whose sum is σ = 98862139296. Its totient is φ = 32886640128.

The previous prime is 61725643613. The next prime is 61725643657. The reversal of 61725643635 is 53634652716.

It is an interprime number because it is at equal distance from previous prime (61725643613) and next prime (61725643657).

It is not a de Polignac number, because 61725643635 - 2⁸ = 61725643379 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2091304 + ... + 2120613.

It is an arithmetic number, because the mean of its divisors is an integer number (6178883706).

Almost surely, 2^61725643635 is an apocalyptic number.

61725643635 is a deficient number, since it is larger than the sum of its proper divisors (37136495661).

61725643635 is a wasteful number, since it uses less digits than its factorization.

61725643635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4212902.

The product of its digits is 2721600, while the sum is 48.

The spelling of 61725643635 in words is "sixty-one billion, seven hundred twenty-five million, six hundred forty-three thousand, six hundred thirty-five".