61513511263 has 16 divisors (see below), whose sum is σ = 66734823456. Its totient is φ = 56470901760.

The previous prime is 61513511261. The next prime is 61513511273. The reversal of 61513511263 is 36211531516.

It is a cyclic number.

It is not a de Polignac number, because 61513511263 - 2¹ = 61513511261 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 (61513511261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5879545 + ... + 5889997.

It is an arithmetic number, because the mean of its divisors is an integer number (4170926466).

Almost surely, 2^61513511263 is an apocalyptic number.

61513511263 is a deficient number, since it is larger than the sum of its proper divisors (5221312193).

61513511263 is a wasteful number, since it uses less digits than its factorization.

61513511263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18954.

The product of its digits is 16200, while the sum is 34.

The spelling of 61513511263 in words is "sixty-one billion, five hundred thirteen million, five hundred eleven thousand, two hundred sixty-three".