61251655 has 8 divisors (see below), whose sum is σ = 73548000. Its totient is φ = 48970656.

The previous prime is 61251653. The next prime is 61251677. The reversal of 61251655 is 55615216.

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 61251655 - 2¹ = 61251653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61251653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8646 + ... + 14044.

It is an arithmetic number, because the mean of its divisors is an integer number (9193500).

Almost surely, 2^61251655 is an apocalyptic number.

61251655 is a deficient number, since it is larger than the sum of its proper divisors (12296345).

61251655 is a wasteful number, since it uses less digits than its factorization.

61251655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7673.

The product of its digits is 9000, while the sum is 31.

The square root of 61251655 is about 7826.3436546065. The cubic root of 61251655 is about 394.1903084857.

The spelling of 61251655 in words is "sixty-one million, two hundred fifty-one thousand, six hundred fifty-five".