10251878465 has 4 divisors (see below), whose sum is σ = 12302254164. Its totient is φ = 8201502768.

The previous prime is 10251878453. The next prime is 10251878513. The reversal of 10251878465 is 56487815201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56487815201 = 71 ⋅795603031.

It can be written as a sum of positive squares in 2 ways, for example, as 7734147136 + 2517731329 = 87944^2 + 50177^2 .

It is a cyclic number.

It is not a de Polignac number, because 10251878465 - 2⁶ = 10251878401 is a prime.

It is a super-2 number, since 2×10251878465² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1025187842 + ... + 1025187851.

It is an arithmetic number, because the mean of its divisors is an integer number (3075563541).

Almost surely, 2^10251878465 is an apocalyptic number.

It is an amenable number.

10251878465 is a deficient number, since it is larger than the sum of its proper divisors (2050375699).

10251878465 is an equidigital number, since it uses as much as digits as its factorization.

10251878465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050375698.

The product of its (nonzero) digits is 537600, while the sum is 47.

The spelling of 10251878465 in words is "ten billion, two hundred fifty-one million, eight hundred seventy-eight thousand, four hundred sixty-five".