61915253811 has 16 divisors (see below), whose sum is σ = 90676803840. Its totient is φ = 37404180000.

The previous prime is 61915253749. The next prime is 61915253819. The reversal of 61915253811 is 11835251916.

It is not a de Polignac number, because 61915253811 - 2⁶ = 61915253747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61915253819) 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, 23612440 + ... + 23615061.

It is an arithmetic number, because the mean of its divisors is an integer number (5667300240).

Almost surely, 2^61915253811 is an apocalyptic number.

61915253811 is a deficient number, since it is larger than the sum of its proper divisors (28761550029).

61915253811 is a wasteful number, since it uses less digits than its factorization.

61915253811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47227546.

The product of its digits is 64800, while the sum is 42.

The spelling of 61915253811 in words is "sixty-one billion, nine hundred fifteen million, two hundred fifty-three thousand, eight hundred eleven".