61903503871 has 8 divisors (see below), whose sum is σ = 67543121664. Its totient is φ = 56265890520.

The previous prime is 61903503863. The next prime is 61903503881. The reversal of 61903503871 is 17830530916.

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 61903503871 - 2³ = 61903503863 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 (61903503821) 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, 436165 + ... + 560398.

It is an arithmetic number, because the mean of its divisors is an integer number (8442890208).

Almost surely, 2^61903503871 is an apocalyptic number.

61903503871 is a deficient number, since it is larger than the sum of its proper divisors (5639617793).

61903503871 is a wasteful number, since it uses less digits than its factorization.

61903503871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002221.

The product of its (nonzero) digits is 136080, while the sum is 43.

The spelling of 61903503871 in words is "sixty-one billion, nine hundred three million, five hundred three thousand, eight hundred seventy-one".