1391630487955 has 16 divisors (see below), whose sum is σ = 1691450095104. Its totient is φ = 1098997187040.

The previous prime is 1391630487869. The next prime is 1391630487979. The reversal of 1391630487955 is 5597840361931.

It is a happy number.

It is not a de Polignac number, because 1391630487955 - 2¹⁹ = 1391629963667 is a prime.

It is a super-3 number, since 3×1391630487955³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1391630487893 and 1391630487902.

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, 851169 + ... + 1872898.

It is an arithmetic number, because the mean of its divisors is an integer number (105715630944).

Almost surely, 2^{1391630487955} is an apocalyptic number.

1391630487955 is a deficient number, since it is larger than the sum of its proper divisors (299819607149).

1391630487955 is a wasteful number, since it uses less digits than its factorization.

1391630487955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2725386.

The product of its (nonzero) digits is 24494400, while the sum is 61.

The spelling of 1391630487955 in words is "one trillion, three hundred ninety-one billion, six hundred thirty million, four hundred eighty-seven thousand, nine hundred fifty-five".