61402513989 has 8 divisors (see below), whose sum is σ = 81878172192. Its totient is φ = 40930932560.

The previous prime is 61402513981. The next prime is 61402513993. The reversal of 61402513989 is 98931520416.

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

It is a cyclic number.

It is not a de Polignac number, because 61402513989 - 2³ = 61402513981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61402513981) 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, 983874 + ... + 1044419.

It is an arithmetic number, because the mean of its divisors is an integer number (10234771524).

Almost surely, 2^61402513989 is an apocalyptic number.

It is an amenable number.

61402513989 is a deficient number, since it is larger than the sum of its proper divisors (20475658203).

61402513989 is a wasteful number, since it uses less digits than its factorization.

61402513989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038387.

The product of its (nonzero) digits is 466560, while the sum is 48.

The spelling of 61402513989 in words is "sixty-one billion, four hundred two million, five hundred thirteen thousand, nine hundred eighty-nine".