61377568503 has 4 divisors (see below), whose sum is σ = 81836758008. Its totient is φ = 40918379000.

The previous prime is 61377568493. The next prime is 61377568523. The reversal of 61377568503 is 30586577316.

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

It is a cyclic number.

It is not a de Polignac number, because 61377568503 - 2⁵ = 61377568471 is a prime.

It is a super-2 number, since 2×61377568503² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61377568523) 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, 10229594748 + ... + 10229594753.

It is an arithmetic number, because the mean of its divisors is an integer number (20459189502).

Almost surely, 2^61377568503 is an apocalyptic number.

61377568503 is a deficient number, since it is larger than the sum of its proper divisors (20459189505).

61377568503 is a wasteful number, since it uses less digits than its factorization.

61377568503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20459189504.

The product of its (nonzero) digits is 3175200, while the sum is 51.

The spelling of 61377568503 in words is "sixty-one billion, three hundred seventy-seven million, five hundred sixty-eight thousand, five hundred three".