61771464 has 32 divisors (see below), whose sum is σ = 171588000. Its totient is φ = 20590416.

The previous prime is 61771459. The next prime is 61771481. The reversal of 61771464 is 46417716.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142774 + ... + 143205.

It is an arithmetic number, because the mean of its divisors is an integer number (5362125).

Almost surely, 2^61771464 is an apocalyptic number.

It is an amenable number.

61771464 is an abundant number, since it is smaller than the sum of its proper divisors (109816536).

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

61771464 is a wasteful number, since it uses less digits than its factorization.

61771464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285994 (or 285984 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 61771464 is about 7859.4824257072. The cubic root of 61771464 is about 395.3022607679.

The spelling of 61771464 in words is "sixty-one million, seven hundred seventy-one thousand, four hundred sixty-four".