61515949 has 8 divisors (see below), whose sum is σ = 68745600. Its totient is φ = 54559200.

The previous prime is 61515947. The next prime is 61515959. The reversal of 61515949 is 94951516.

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 61515949 - 2¹ = 61515947 is a prime.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61515947) 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, 67749 + ... + 68650.

It is an arithmetic number, because the mean of its divisors is an integer number (8593200).

Almost surely, 2^61515949 is an apocalyptic number.

It is an amenable number.

61515949 is a deficient number, since it is larger than the sum of its proper divisors (7229651).

61515949 is a wasteful number, since it uses less digits than its factorization.

61515949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136451.

The product of its digits is 48600, while the sum is 40.

The square root of 61515949 is about 7843.2103758601. The cubic root of 61515949 is about 394.7564572525.

It can be divided in two parts, 6151 and 5949, that added together give a square (12100 = 110²).

The spelling of 61515949 in words is "sixty-one million, five hundred fifteen thousand, nine hundred forty-nine".