61402881 has 8 divisors (see below), whose sum is σ = 81911584. Its totient is φ = 40914720.

The previous prime is 61402877. The next prime is 61402897. The reversal of 61402881 is 18820416.

61402881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61402881 - 2² = 61402877 is a prime.

It is a super-2 number, since 2×61402881² = 7540627590200322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61402841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4341 + ... + 11901.

It is an arithmetic number, because the mean of its divisors is an integer number (10238948).

Almost surely, 2^61402881 is an apocalyptic number.

It is an amenable number.

61402881 is a deficient number, since it is larger than the sum of its proper divisors (20508703).

61402881 is a wasteful number, since it uses less digits than its factorization.

61402881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10271.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 61402881 is about 7835.9990428790. Note that the first 3 decimals coincide. The cubic root of 61402881 is about 394.5144511919.

The spelling of 61402881 in words is "sixty-one million, four hundred two thousand, eight hundred eighty-one".