61087680 has 84 divisors (see below), whose sum is σ = 210126072. Its totient is φ = 16289280.

The previous prime is 61087669. The next prime is 61087693. The reversal of 61087680 is 8678016.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7726 + ... + 13485.

Almost surely, 2^61087680 is an apocalyptic number.

61087680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61087680 is an abundant number, since it is smaller than the sum of its proper divisors (149038392).

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

61087680 is a wasteful number, since it uses less digits than its factorization.

61087680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21234 (or 21221 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 61087680 is about 7815.8607971227. The cubic root of 61087680 is about 393.8382357057.

The spelling of 61087680 in words is "sixty-one million, eighty-seven thousand, six hundred eighty".