61646988 has 24 divisors (see below), whose sum is σ = 154908208. Its totient is φ = 18968256.

The previous prime is 61646983. The next prime is 61646989. The reversal of 61646988 is 88964616.

It is a super-2 number, since 2×61646988² = 7600702258944288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61646983) 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, 197431 + ... + 197742.

Almost surely, 2^61646988 is an apocalyptic number.

It is an amenable number.

61646988 is an abundant number, since it is smaller than the sum of its proper divisors (93261220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61646988 is a wasteful number, since it uses less digits than its factorization.

61646988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395193 (or 395191 counting only the distinct ones).

The product of its digits is 497664, while the sum is 48.

The square root of 61646988 is about 7851.5595902980. The cubic root of 61646988 is about 395.0365569968.

The spelling of 61646988 in words is "sixty-one million, six hundred forty-six thousand, nine hundred eighty-eight".