61154699807 has 2 divisors, whose sum is σ = 61154699808. Its totient is φ = 61154699806.

The previous prime is 61154699789. The next prime is 61154699821. The reversal of 61154699807 is 70899645116.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61154699807 - 2¹² = 61154695711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61154699867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30577349903 + 30577349904.

It is an arithmetic number, because the mean of its divisors is an integer number (30577349904).

Almost surely, 2^61154699807 is an apocalyptic number.

61154699807 is a deficient number, since it is larger than the sum of its proper divisors (1).

61154699807 is an equidigital number, since it uses as much as digits as its factorization.

61154699807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The spelling of 61154699807 in words is "sixty-one billion, one hundred fifty-four million, six hundred ninety-nine thousand, eight hundred seven".