1915400061 has 64 divisors (see below), whose sum is σ = 2973024000. Its totient is φ = 1218032640.

The previous prime is 1915400027. The next prime is 1915400063. The reversal of 1915400061 is 1600045191.

It is not a de Polignac number, because 1915400061 - 2⁷ = 1915399933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1915399998 and 1915400034.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1915400063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10700470 + ... + 10700648.

It is an arithmetic number, because the mean of its divisors is an integer number (46453500).

Almost surely, 2^1915400061 is an apocalyptic number.

It is an amenable number.

1915400061 is a deficient number, since it is larger than the sum of its proper divisors (1057623939).

1915400061 is a wasteful number, since it uses less digits than its factorization.

1915400061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1915400061 is about 43765.2837417970. The cubic root of 1915400061 is about 1241.8996336549.

The spelling of 1915400061 in words is "one billion, nine hundred fifteen million, four hundred thousand, sixty-one".