125977665418 has 32 divisors (see below), whose sum is σ = 208256158080. Its totient is φ = 56676600000.

The previous prime is 125977665409. The next prime is 125977665427. The reversal of 125977665418 is 814566779521.

It is an interprime number because it is at equal distance from previous prime (125977665409) and next prime (125977665427).

It is a super-2 number, since 2×125977665418² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8215963 + ... + 8231281.

It is an arithmetic number, because the mean of its divisors is an integer number (6508004940).

Almost surely, 2^125977665418 is an apocalyptic number.

125977665418 is a deficient number, since it is larger than the sum of its proper divisors (82278492662).

125977665418 is a wasteful number, since it uses less digits than its factorization.

125977665418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19134.

The product of its digits is 25401600, while the sum is 61.

It can be divided in two parts, 1259 and 77665418, that added together give a palindrome (77666677).

The spelling of 125977665418 in words is "one hundred twenty-five billion, nine hundred seventy-seven million, six hundred sixty-five thousand, four hundred eighteen".