1265166450004 has 6 divisors (see below), whose sum is σ = 2214041287514. Its totient is φ = 632583225000.

The previous prime is 1265166449971. The next prime is 1265166450049. The reversal of 1265166450004 is 4000546615621.

It can be written as a sum of positive squares in only one way, i.e., 1256775523600 + 8390926404 = 1121060^2 + 91602^2 .

It is a super-2 number, since 2×1265166450004² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158145806247 + ... + 158145806254.

Almost surely, 2^{1265166450004} is an apocalyptic number.

It is an amenable number.

1265166450004 is a deficient number, since it is larger than the sum of its proper divisors (948874837510).

1265166450004 is a wasteful number, since it uses less digits than its factorization.

1265166450004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316291612505 (or 316291612503 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 1265166450004 in words is "one trillion, two hundred sixty-five billion, one hundred sixty-six million, four hundred fifty thousand, four".