77151399251 has 18 divisors (see below), whose sum is σ = 83738229948. Its totient is φ = 71067534400.

The previous prime is 77151399209. The next prime is 77151399263. The reversal of 77151399251 is 15299315177.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-77151399251 is a prime.

It is a super-2 number, since 2×77151399251² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77151399251.

It is not an unprimeable number, because it can be changed into a prime (77151399271) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 577976 + ... + 698826.

It is an arithmetic number, because the mean of its divisors is an integer number (4652123886).

Almost surely, 2^77151399251 is an apocalyptic number.

77151399251 is a deficient number, since it is larger than the sum of its proper divisors (6586830697).

77151399251 is a wasteful number, since it uses less digits than its factorization.

77151399251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120979 (or 120915 counting only the distinct ones).

The product of its digits is 595350, while the sum is 50.

The spelling of 77151399251 in words is "seventy-seven billion, one hundred fifty-one million, three hundred ninety-nine thousand, two hundred fifty-one".