61690561959051 has 32 divisors (see below), whose sum is σ = 91450414817280. Its totient is φ = 41101403689728.

The previous prime is 61690561959031. The next prime is 61690561959067. The reversal of 61690561959051 is 15095916509616.

61690561959051 is a `hidden beast` number, since 6 + 1 + 6 + 9 + 0 + 5 + 619 + 5 + 9 + 0 + 5 + 1 = 666.

It is not a de Polignac number, because 61690561959051 - 2¹⁹ = 61690561434763 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 61690561959051.

It is not an unprimeable number, because it can be changed into a prime (61690561959001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 295962670 + ... + 296171036.

It is an arithmetic number, because the mean of its divisors is an integer number (2857825463040).

Almost surely, 2^{61690561959051} is an apocalyptic number.

61690561959051 is a deficient number, since it is larger than the sum of its proper divisors (29759852858229).

61690561959051 is a wasteful number, since it uses less digits than its factorization.

61690561959051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215160 (or 215154 counting only the distinct ones).

The product of its (nonzero) digits is 19683000, while the sum is 63.

The spelling of 61690561959051 in words is "sixty-one trillion, six hundred ninety billion, five hundred sixty-one million, nine hundred fifty-nine thousand, fifty-one".