61915651 has 8 divisors (see below), whose sum is σ = 70856960. Its totient is φ = 52998408.

The previous prime is 61915639. The next prime is 61915663. The reversal of 61915651 is 15651916.

It is an interprime number because it is at equal distance from previous prime (61915639) and next prime (61915663).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61915651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61915681) 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, 111 + ... + 11128.

It is an arithmetic number, because the mean of its divisors is an integer number (8857120).

Almost surely, 2^61915651 is an apocalyptic number.

61915651 is a deficient number, since it is larger than the sum of its proper divisors (8941309).

61915651 is a wasteful number, since it uses less digits than its factorization.

61915651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12033.

The product of its digits is 8100, while the sum is 34.

The square root of 61915651 is about 7868.6498841923. The cubic root of 61915651 is about 395.6095933827.

The spelling of 61915651 in words is "sixty-one million, nine hundred fifteen thousand, six hundred fifty-one".