15494861077 has 2 divisors, whose sum is σ = 15494861078. Its totient is φ = 15494861076.

The previous prime is 15494861069. The next prime is 15494861113. The reversal of 15494861077 is 77016849451.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13003753156 + 2491107921 = 114034^2 + 49911^2 .

It is a cyclic number.

It is not a de Polignac number, because 15494861077 - 2³ = 15494861069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15494861047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7747430538 + 7747430539.

It is an arithmetic number, because the mean of its divisors is an integer number (7747430539).

Almost surely, 2^15494861077 is an apocalyptic number.

It is an amenable number.

15494861077 is a deficient number, since it is larger than the sum of its proper divisors (1).

15494861077 is an equidigital number, since it uses as much as digits as its factorization.

15494861077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 15494861077 in words is "fifteen billion, four hundred ninety-four million, eight hundred sixty-one thousand, seventy-seven".