61313913487 has 4 divisors (see below), whose sum is σ = 63291781696. Its totient is φ = 59336045280.

The previous prime is 61313913461. The next prime is 61313913509. The reversal of 61313913487 is 78431931316.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61313913487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61313913887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 988934058 + ... + 988934119.

It is an arithmetic number, because the mean of its divisors is an integer number (15822945424).

Almost surely, 2^61313913487 is an apocalyptic number.

61313913487 is a deficient number, since it is larger than the sum of its proper divisors (1977868209).

61313913487 is a wasteful number, since it uses less digits than its factorization.

61313913487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977868208.

The product of its digits is 326592, while the sum is 46.

It can be divided in two parts, 613139 and 13487, that added together give a palindrome (626626).

The spelling of 61313913487 in words is "sixty-one billion, three hundred thirteen million, nine hundred thirteen thousand, four hundred eighty-seven".