61988245 has 16 divisors (see below), whose sum is σ = 81959040. Its totient is φ = 44632000.

The previous prime is 61988231. The next prime is 61988249. The reversal of 61988245 is 54288916.

It is a happy number.

It is not a de Polignac number, because 61988245 - 2¹⁵ = 61955477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61988249) 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, 25 + ... + 11134.

It is an arithmetic number, because the mean of its divisors is an integer number (5122440).

Almost surely, 2^61988245 is an apocalyptic number.

It is an amenable number.

61988245 is a deficient number, since it is larger than the sum of its proper divisors (19970795).

61988245 is a wasteful number, since it uses less digits than its factorization.

61988245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11276.

The product of its digits is 138240, while the sum is 43.

The square root of 61988245 is about 7873.2613953812. The cubic root of 61988245 is about 395.7641459377.

The spelling of 61988245 in words is "sixty-one million, nine hundred eighty-eight thousand, two hundred forty-five".