61526477640091 has 2 divisors, whose sum is σ = 61526477640092. Its totient is φ = 61526477640090.

The previous prime is 61526477640029. The next prime is 61526477640101. The reversal of 61526477640091 is 19004677462516.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61526477640091 is a prime.

It is not a weakly prime, because it can be changed into another prime (61526477647091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30763238820045 + 30763238820046.

It is an arithmetic number, because the mean of its divisors is an integer number (30763238820046).

Almost surely, 2^{61526477640091} is an apocalyptic number.

61526477640091 is a deficient number, since it is larger than the sum of its proper divisors (1).

61526477640091 is an equidigital number, since it uses as much as digits as its factorization.

61526477640091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15240960, while the sum is 58.

The spelling of 61526477640091 in words is "sixty-one trillion, five hundred twenty-six billion, four hundred seventy-seven million, six hundred forty thousand, ninety-one".